Enabling remaining minimum system information (rmsi) repetition or rmsi slot aggregation

ABSTRACT

This disclosure provides systems, methods, and apparatuses, including computer programs encoded on computer storage media, for wireless communication. In one aspect, a method of wireless communication performed by a user equipment (UE) includes receiving, from a base station, a remaining minimum system information (RMSI) physical downlink control channel (PDCCH) that includes downlink control information (DCI). The DCI indicates a configuration of resources associated with RMSI repetition or RMSI slot aggregation. The method further includes monitoring for one or more RMSI messages based on the configuration of resources. The monitoring includes monitoring for multiple repetitions of an RMSI message based on the configuration of resources being associated with RMSI repetition and monitoring for a single RMSI message that is divided across multiple slots based on the configuration of resources being associated with RMSI slot aggregation. Other aspects are also claimed and described.

CROSS-REFERENCE TO RELATED APPLICATIONS

This application claims the benefit of U.S. Provisional PatentApplication No. 63/008,030, entitled, “ENABLING REMAINING MINIMUM SYSTEMINFORMATION (RMSI) REPETITION OR RMSI SLOT AGGREGATION,” filed on Apr.10, 2020, which is expressly incorporated by reference herein in itsentirety.

TECHNICAL FIELD

Aspects of the present disclosure relate generally to wirelesscommunication systems, and more particularly, to enabling remainingminimum system information (RMSI) repetition or RMSI slot aggregation inwireless communication systems.

DESCRIPTION OF THE RELATED TECHNOLOGY

Wireless communications systems are widely deployed to provide varioustypes of communication content such as voice, video, packet data,messaging, broadcast, and so on. A wireless multiple-accesscommunications system may include a number of base stations or networkaccess nodes, each simultaneously supporting communication for multiplecommunication devices, which may be otherwise known as user equipment(UE). These systems may be capable of supporting communication withmultiple UEs by sharing the available system resources (such as time,frequency, and power). Examples of such multiple-access systems includefourth generation (4G) systems such as Long Term Evolution (LTE)systems, LTE-Advanced (LTE-A) systems, or LTE-A Pro systems, and fifthgeneration (5G) systems which may be referred to as New Radio (NR)systems. These systems may employ technologies such as code divisionmultiple access (CDMA), time division multiple access (TDMA), frequencydivision multiple access (FDMA), orthogonal frequency division multipleaccess (OFDMA), or discrete Fourier transform spread orthogonalfrequency division multiplexing (DFT-S-OFDM).

One technique used by at least some 5G wireless communication systems isthe communication of control information and data via millimeter-wavetransmissions. Millimeter-wave typically refers to the band in thecommunication spectrum between 30 gigahertz (GHz) and 300 GHz.Millimeter-wave communications enable 5G wireless communication systemsto have expanded capacity, as compared to 4G wireless communicationsystems. In 5G communication systems, control information and data arecommunicated between base stations and UEs via a variety of channels.Channels may refer to time resources, such as time blocks, frequencyresources, such as frequency bands or subbands, or both, that are usedby the base stations and UEs to perform wireless communications. As anexample, control information is typically communicated from a basestation to a UE via a physical downlink control channel (PDCCH), anddata is typically communicated from a base station to a UE via aphysical downlink shared channel (PDSCH). Additional channels may beused for uplink communications from the UE to the base station. Anothertype of channel used for communication between the UE and the basestation is a random access channel (RACH). UEs typically transmitmessages to the base station via the RACH to gain access to the network,such as to schedule calls or for bursty data transmissions.

To enable access to the network, the base station may transmit, to a UE,a master information block (MIB) that includes a first portion ofinformation used to access the network. The remaining portions of theinformation may be included in one or more remaining minimum systeminformation (RMSI) messages that are transmitted from the base stationto the UE. RMSI messages in 5G communication systems may be similar tosystem information blocks (SIBS) SIB1 and SIB2 in LTE communicationsystems.

As research into millimeter-wave communications continues in 5G wirelesscommunication systems, a source of potential bottleneck for coverage ofthe millimeter-wave communications is RMSI messages. One reason for thelimited coverage of the RMSI messages is that network entities, such asbase stations, use wide broadcast beams to transmit the RMSI messagesand corresponding scheduling information. These broadcast beams may notprovide sufficient gain for communication of the RMSI messages and thescheduling information to at least some UEs at the edge of a coveragearea.

SUMMARY

The following summarizes some aspects of the present disclosure toprovide a basic understanding of the discussed technology. This summaryis not an extensive overview of all contemplated features of thedisclosure, and is intended neither to identify key or critical elementsof all aspects of the disclosure nor to delineate the scope of any orall aspects of the disclosure. Its sole purpose is to present someconcepts of one or more aspects of the disclosure in summary form as aprelude to the more detailed description that is presented later.

One innovative aspect of the subject matter described in this disclosurecan be implemented in a method of wireless communication performed by auser equipment (UE). The method includes receiving, from a base station,a remaining minimum system information (RMSI) physical downlink controlchannel (PDCCH) that includes downlink control information (DCI). TheDCI indicates a configuration of resources associated with RMSIrepetition or RMSI slot aggregation. The method further includesmonitoring for one or more RMSI messages based on the configuration ofresources. The monitoring includes monitoring for multiple repetitionsof an RMSI message based on the configuration of resources beingassociated with RMSI repetition and monitoring for a single RMSI messagethat is divided across multiple slots based on the configuration ofresources being associated with RMSI slot aggregation.

Another innovative aspect of the subject matter described in thisdisclosure can be implemented in a UE. The UE includes at least oneprocessor and a memory coupled with the at least one processor andstoring processor-readable instructions that, when executed by the atleast one processor, is configured to receive, from a base station, anRMSI PDCCH that includes DCI. The DCI indicates a configuration ofresources associated with RMSI repetition or RMSI slot aggregation. Theat least one processor is further configured to monitor for one or moreRMSI messages based on the configuration of resources. The monitoringincludes monitoring for multiple repetitions of an RMSI message based onthe configuration of resources being associated with RMSI repetition andmonitoring for a single RMSI message that is divided across multipleslots based on the configuration of resources being associated with RMSIslot aggregation.

Another innovative aspect of the subject matter described in thisdisclosure can be implemented in an apparatus configured for wirelesscommunication. The apparatus includes means for receiving, from a basestation, an RMSI PDCCH that includes DCI. The DCI indicates aconfiguration of resources associated with RMSI repetition or RMSI slotaggregation. The apparatus further includes means for monitoring for oneor more RMSI messages based on the configuration of resources. Themonitoring includes monitoring for multiple repetitions of an RMSImessage based on the configuration of resources being associated withRMSI repetition and monitoring for a single RMSI message that is dividedacross multiple slots based on the configuration of resources beingassociated with RMSI slot aggregation.

Another innovative aspect of the subject matter described in thisdisclosure can be implemented in a non-transitory computer-readablemedium storing instructions that, when executed by a processor, causethe processor to perform operations including receiving, from a basestation, an RMSI PDCCH that includes DCI. The DCI indicates aconfiguration of resources associated with RMSI repetition or RMSI slotaggregation. The operations further include monitoring for one or moreRMSI messages based on the configuration of resources. The monitoringincludes monitoring for multiple repetitions of an RMSI message based onthe configuration of resources being associated with RMSI repetition andmonitoring for a single RMSI message that is divided across multipleslots based on the configuration of resources being associated with RMSIslot aggregation.

Another innovative aspect of the subject matter described in thisdisclosure can be implemented in a method of wireless communicationperformed by a base station. The method includes determining to transmitRMSI to one or more UEs using RMSI repetition or RMSI slot aggregation.The method includes generating DCI that indicates a configuration ofresources associated with RMSI repetition or RMSI slot aggregation. Themethod also includes transmitting, to the one or more UEs, the DCI viaan RMSI PDCCH. The method further includes transmitting, to the one ormore UEs, an RMSI physical downlink shared channel (PDSCH) that includesmultiple repetitions of an RMSI message based on determining to transmitthe RMSI using RMSI repetition and a single RMSI message that is dividedacross multiple slots based on determining to transmit the RMSI usingRMSI slot aggregation.

Another innovative aspect of the subject matter described in thisdisclosure can be implemented in a base station. The base stationincludes at least one processor and a memory coupled with the at leastone processor and storing processor-readable code that, when executed bythe processor, is configured to determine to transmit RMSI to one ormore UEs using RMSI repetition or RMSI slot aggregation. The at leastone processor is configured to generate DCI that indicates aconfiguration of resources associated with RMSI repetition or RMSI slotaggregation. The at least one processor is also configured to initiatetransmission, to the one or more UEs, of the DCI via an RMSI PDCCH. Theat least one processor is further configured to initiate transmission,to the one or more UEs, of an RMSI PDSCH that includes multiplerepetitions of an RMSI message based on determining to transmit the RMSIusing RMSI repetition and a single RMSI message that is divided acrossmultiple slots based on determining to transmit the RMSI using RMSI slotaggregation.

Another innovative aspect of the subject matter described in thisdisclosure can be implemented in an apparatus configured for wirelesscommunication. The apparatus includes means for determining to transmitRMSI to one or more UEs using RMSI repetition or RMSI slot aggregation.The apparatus includes means for generating DCI that indicates aconfiguration of resources associated with RMSI repetition or RMSI slotaggregation. The apparatus also includes means for transmitting, to theone or more UEs, the DCI via an RMSI PDCCH. The apparatus furtherincludes means for transmitting, to the one or more UEs, an RMSI PDSCHthat includes multiple repetitions of an RMSI message based ondetermining to transmit the RMSI using RMSI repetition and a single RMSImessage that is divided across multiple slots based on determining totransmit the RMSI using RMSI slot aggregation.

Another innovative aspect of the subject matter described in thisdisclosure can be implemented in a non-transitory computer-readablemedium storing instructions that, when executed by a processor, causethe processor to perform operations including determining to transmitRMSI to one or more UEs using RMSI repetition or RMSI slot aggregation.The operations include generating DCI that indicates a configuration ofresources associated with RMSI repetition or RMSI slot aggregation. Theoperations also include initiating transmission, to the one or more UEs,of the DCI via an RMSI PDCCH. The operations further include initiatingtransmission, to the one or more UEs, of an RMSI PDSCH that includesmultiple repetitions of an RMSI message based on determining to transmitthe RMSI using RMSI repetition and a single RMSI message that is dividedacross multiple slots based on determining to transmit the RMSI usingRMSI slot aggregation.

Another innovative aspect of the subject matter described in thisdisclosure can be implemented in a method of wireless communicationperformed by a base station. The method includes transmitting, to one ormore UEs, an RMSI PDCCH that includes DCI indicating a configuration ofresources associated with RMSI repetition or RMSI slot aggregation. Themethod further includes transmitting, to the one or more UEs, an RMSIPDSCH over the resources using RMSI repetition or RMSI slot aggregationaccording to the configuration of resources. The transmitting includestransmitting multiple repetitions of an RMSI message based on using RMSIrepetition and transmitting a single RMSI message that is divided acrossmultiple slots based on using RMSI slot aggregation.

Another innovative aspect of the subject matter described in thisdisclosure can be implemented in a base station. The base stationincludes at least one processor and a memory coupled with the at leastone processor and storing processor-readable code that, when executed bythe processor, is configured to initiate transmission, to one or moreUEs, of an RMSI PDCCH that includes DCI indicating a configuration ofresources associated with RMSI repetition or RMSI slot aggregation. Theat least one processor is further configured to initiate transmission,to the one or more UEs, of an RMSI PDSCH over the resources using RMSIrepetition or RMSI slot aggregation according to the configuration ofresources. The transmission includes transmission of multiplerepetitions of an RMSI message based on using RMSI repetition andtransmission of a single RMSI message that is divided across multipleslots based on using RMSI slot aggregation.

Another innovative aspect of the subject matter described in thisdisclosure can be implemented in an apparatus configured for wirelesscommunication. The apparatus includes means for transmitting, to one ormore UEs, an RMSI PDCCH that includes DCI indicating a configuration ofresources associated with RMSI repetition or RMSI slot aggregation. Theapparatus also includes means for transmitting, to the one or more UEs,an RMSI PDSCH over the resources using RMSI repetition or RMSI slotaggregation according to the configuration of resources. Thetransmitting includes transmitting multiple repetitions of an RMSImessage based on using RMSI repetition and transmitting a single RMSImessage that is divided across multiple slots based on using RMSI slotaggregation.

Another innovative aspect of the subject matter described in thisdisclosure can be implemented in a non-transitory computer-readablemedium storing instructions that, when executed by a processor, causethe processor to perform operations including initiating transmission,to one or more UEs, of an RMSI PDCCH that includes DCI indicating aconfiguration of resources associated with RMSI repetition or RMSI slotaggregation. The operations further include initiating transmission, tothe one or more UEs, of an RMSI PDSCH over the resources using RMSIrepetition or RMSI slot aggregation according to the configuration ofresources. The transmission includes transmission of repetitions of anRMSI message based on using RMSI repetition and transmission of a singleRMSI message that is divided across multiple slots based on using RMSIslot aggregation.

Other aspects, features, and implementations of the present disclosurewill become apparent to a person having ordinary skill in the art, uponreviewing the following description of specific, example implementationsof the present disclosure in conjunction with the accompanying figures.While features of the present disclosure may be described relative toparticular implementations and figures below, all implementations of thepresent disclosure can include one or more of the advantageous featuresdescribed herein. In other words, while one or more implementations maybe described as having particular advantageous features, one or more ofsuch features may also be used in accordance with the variousimplementations of the disclosure described herein. In similar fashion,while example implementations may be described below as device, system,or method implementations, such example implementations can beimplemented in various devices, systems, and methods.

BRIEF DESCRIPTION OF THE DRAWINGS

A further understanding of the nature and advantages of the presentdisclosure may be realized by reference to the following drawings. Inthe appended figures, similar components or features may have the samereference label. Further, various components of the same type may bedistinguished by following the reference label by a dash and a secondlabel that distinguishes among the similar components. If just the firstreference label is used in the specification, the description isapplicable to any one of the similar components having the same firstreference label irrespective of the second reference label.

FIG. 1 is a block diagram illustrating details of an example wirelesscommunication system according to one or more aspects.

FIG. 2 is a block diagram illustrating examples of a base station and auser equipment (UE) according to one or more aspects.

FIG. 3 is a block diagram illustrating an example wireless communicationsystem that supports remaining minimum system information (RMSI)repetition or RMSI slot aggregation according to one or more aspects.

FIGS. 4A and 4B are timelines of examples of RMSI repetition and RMSIslot aggregation, respectively, according to one or more aspects.

FIG. 5 is a flow diagram illustrating an example process that supportsRMSI repetition or RMSI slot aggregation according to one or moreaspects.

FIG. 6 is a block diagram of an example UE that supports RMSI repetitionor RMSI slot aggregation according to one or more aspects.

FIG. 7 is a flow diagram illustrating an example process that supportsRMSI repetition or RMSI slot aggregation according to one or moreaspects.

FIG. 8 is a block diagram of an example base station that supports RMSIrepetition or RMSI slot aggregation according to one or more aspects.

Like reference numbers and designations in the various drawings indicatelike elements.

DETAILED DESCRIPTION

Various aspects of the disclosure are described more fully hereinafterwith reference to the accompanying drawings. This disclosure may,however, be embodied in many different forms and are not to be construedas limited to any specific structure or function presented throughoutthis disclosure. Rather, these aspects are provided so that thisdisclosure will be thorough and complete, and will fully convey thescope of the disclosure to those skilled in the art. Based on theteachings herein one skilled in the art may appreciate that the scope ofthe disclosure is intended to cover any aspect of the disclosuredisclosed herein, whether implemented independently of or combined withany other aspect of the disclosure. For example, an apparatus may beimplemented or a method may be practiced using any quantity of theaspects set forth herein. In addition, the scope of the disclosure isintended to cover such an apparatus or method which is practiced usingother structure, functionality, or structure and functionality inaddition to or other than the various aspects of the disclosure setforth herein. Any aspect of the disclosure disclosed herein may beembodied by one or more elements of a claim.

The electromagnetic spectrum is often subdivided, based on frequency (orwavelength), into various classes, bands or channels. In fifthgeneration (5G) new radio (NR), two initial operating bands have beenidentified as frequency range designations FR1 (410 MHz-7.125 GHz) andFR2 (24.25 GHz-52.6 GHz). The frequencies between FR1 and FR2 are oftenreferred to as mid-band frequencies. Although a portion of FR1 isgreater than 6 GHz, FR1 is often referred to (interchangeably) as a“sub-6 GHz” band in various documents and articles. A similarnomenclature issue sometimes occurs with regard to FR2, which is oftenreferred to (interchangeably) as a “millimeter wave” band (or spectrum)in documents and articles, despite being different than the extremelyhigh frequency (EHF) band (30 GHz-300 GHz) which is identified by theInternational Telecommunications Union (ITU) as a “millimeter wave”band. With the above aspects in mind, unless specifically statedotherwise, it should be understood that the term “sub-6 GHz” or the likeif used herein may broadly represent frequencies that may be less than 6GHz, may be within FR1, or may include mid-band frequencies. Further,unless specifically stated otherwise, it should be understood that theterm “millimeter wave” or the like if used herein may broadly representfrequencies that may include mid-band frequencies, may be within FR2, ormay be within the EHF band.

The present disclosure provides systems, apparatus, methods, andcomputer-readable media for enabling remaining minimum systeminformation (RMSI) repetition or RMSI slot aggregation. As used herein,performing RMSI repetition includes transmitting multiple repetitions ofan RMSI message (that is, an RMSI message and one or more copies of theRMSI message) via an RMSI physical downlink shared channel (PDSCH). Asused herein, performing RMSI slot aggregation includes dividing a singleRMSI message into multiple portions and transmitting each of themultiple portions during a respective slot of a frame via an RMSI PDSCH.To illustrate, a base station may determine to transmit RMSI to one ormore user equipments (UEs) using RMSI repetition or RMSI slotaggregation, and the base station may generate downlink controlinformation (DCI) that indicates a configuration of resources, such astime resources, frequency resources, or both time and frequencyresources, that are associated with the RMSI repetition or RMSI slotaggregation. The base station may transmit the DCI via an RMSI physicaldownlink control channel (PDCCH) to the one or more UEs. The basestation also transmits, to the one or more UEs, an RMSI PDSCH based onthe configuration. For example, if RMSI repetition is configured for agiven transmission, the RMSI PDSCH includes multiple repetitions of anRMSI message. Alternatively, if RMSI slot aggregation is configured fora given transmission, the RMSI PDSCH includes a single RMSI message thatis divided across multiple slots of a frame.

In some implementations, the base station transmits, to the one or moreUEs, a configuration message via a physical broadcasts channel (PBCH).The configuration message includes one or more fields that indicate amapping between a value of one or more fields of the DCI and resources,parameters, or both resources and parameters, associated with RMSIrepetition or RMSI slot aggregation. In some implementations, each ofthe UEs interpret the one or more fields of the configuration messagebased on predetermined control resource set (CORESET) information storedat the UEs, as further described herein.

Particular implementations of the subject matter described in thisdisclosure can be implemented to realize one or more of the followingpotential advantages. In some aspects, the present disclosure providestechniques for enabling RMSI repetition or RMSI slot aggregation.Performing RMSI repetition or RMSI slot aggregation within a wirelesscommunication system increases the number of communicated messages thatinclude at least portions of the RMSI. Increasing the number ofcommunicated messages that include the RMSI may increase reliability andcoverage of the RMSI such that a likelihood that UEs at an edge of acoverage area will successfully receive the RMSI message (or portionsthereof) is increased, as compared to transmitting only a single RMSImessage and only during a single slot.

This disclosure relates generally to providing or participating inauthorized shared access between two or more wireless communicationssystems, also referred to as wireless communications networks. Invarious implementations, the techniques and apparatus may be used forwireless communication networks such as code division multiple access(CDMA) networks, time division multiple access (TDMA) networks,frequency division multiple access (FDMA) networks, orthogonal FDMA(OFDMA) networks, single-carrier FDMA (SC-FDMA) networks, LTE networks,GSM networks, 5th Generation (5G) or new radio (NR) networks (sometimesreferred to as “5G NR” networks, systems, or devices), as well as othercommunications networks. As described herein, the terms “networks” and“systems” may be used interchangeably.

A CDMA network may implement a radio technology such as universalterrestrial radio access (UTRA), cdma2000, and the like. UTRA includeswideband-CDMA (W-CDMA) and low chip rate (LCR). CDMA2000 covers IS-2000,IS-95, and IS-856 standards.

A TDMA network may implement a radio technology such as Global Systemfor Mobile Communications (GSM). 3GPP defines standards for the GSM EDGE(enhanced data rates for GSM evolution) radio access network (RAN), alsodenoted as GERAN. GERAN is the radio component of GSM or GSM EDGE,together with the network that joins the base stations (for example, theAter and Abis interfaces, among other examples) and the base stationcontrollers (for example, A interfaces, among other examples). The radioaccess network represents a component of a GSM network, through whichphone calls and packet data are routed from and to the public switchedtelephone network (PSTN) and Internet to and from subscriber handsets,also known as user terminals or user equipments (UEs). A mobile phoneoperator's network may include one or more GERANs, which may be coupledwith UTRANs in the case of a UMTS or GSM network. Additionally, anoperator network may include one or more LTE networks, or one or moreother networks. The various different network types may use differentradio access technologies (RATs) and radio access networks (RANs).

An OFDMA network may implement a radio technology such as evolved UTRA(E-UTRA), IEEE 802.11, IEEE 802.16, IEEE 802.20, flash-OFDM and thelike. UTRA, E-UTRA, and GSM are part of universal mobiletelecommunication system (UMTS). In particular, long term evolution(LTE) is a release of UMTS that uses E-UTRA. UTRA, E-UTRA, GSM, UMTS andLTE are described in documents provided from an organization named the“3rd Generation Partnership Project” (3GPP), and cdma2000 is describedin documents from an organization named “3rd Generation PartnershipProject 2” (3GPP2). These various radio technologies and standards areknown or are being developed. For example, the 3GPP is a collaborationbetween groups of telecommunications associations that aims to define aglobally applicable third generation (3G) mobile phone specification.3GPP long term evolution (LTE) is a 3GPP project aimed at improving theuniversal mobile telecommunications system (UMTS) mobile phone standard.The 3GPP may define specifications for the next generation of mobilenetworks, mobile systems, and mobile devices. The present disclosure maydescribe certain aspects with reference to LTE, 4G, 5G, or NRtechnologies; however, the description is not intended to be limited toa specific technology or application, and one or more aspects describedwith reference to one technology may be understood to be applicable toanother technology. Indeed, one or more aspects the present disclosureare related to shared access to wireless spectrum between networks usingdifferent radio access technologies or radio air interfaces.

5G networks contemplate diverse deployments, diverse spectrum, anddiverse services and devices that may be implemented using an OFDM-basedunified, air interface. To achieve these goals, further enhancements toLTE and LTE-A are considered in addition to development of the new radiotechnology for 5G NR networks. The 5G NR will be capable of scaling toprovide coverage (1) to a massive Internet of things (IoTs) with anultra-high density (such as ˜1M nodes per km2), ultra-low complexity(such as ˜10s of bits per sec), ultra-low energy (such as ˜10+ years ofbattery life), and deep coverage with the capability to reachchallenging locations; (2) including mission-critical control withstrong security to safeguard sensitive personal, financial, orclassified information, ultra-high reliability (such as 99.9999%reliability), ultra-low latency (such as ˜1 millisecond (ms)), and userswith wide ranges of mobility or lack thereof; and (3) with enhancedmobile broadband including extreme high capacity (such as ˜10 Tbps perkm2), extreme data rates (such as multi-Gbps rate, 100+ Mbps userexperienced rates), and deep awareness with advanced discovery andoptimizations.

5G NR devices, networks, and systems may be implemented to use optimizedOFDM-based waveform features. These features may include scalablenumerology and transmission time intervals (TTIs); a common, flexibleframework to efficiently multiplex services and features with a dynamic,low-latency time division duplex (TDD) or frequency division duplex(FDD) design; and advanced wireless technologies, such as massivemultiple input, multiple output (MIMO), robust millimeter wave (mmWave)transmissions, advanced channel coding, and device-centric mobility.Scalability of the numerology in 5G NR, with scaling of subcarrierspacing, may efficiently address operating diverse services acrossdiverse spectrum and diverse deployments. For example, in variousoutdoor and macro coverage deployments of less than 3 GHz FDD or TDDimplementations, subcarrier spacing may occur with 15 kHz, for exampleover 1, 5, 10, 20 MHz, and the like bandwidth. For other various outdoorand small cell coverage deployments of TDD greater than 3 GHz,subcarrier spacing may occur with 30 kHz over 80 or 100 MHz bandwidth.For other various indoor wideband implementations, using a TDD over theunlicensed portion of the 5 GHz band, the subcarrier spacing may occurwith 60 kHz over a 160 MHz bandwidth. Finally, for various deploymentstransmitting with mmWave components at a TDD of 28 GHz, subcarrierspacing may occur with 120 kHz over a 500 MHz bandwidth.

The scalable numerology of 5G NR facilitates scalable TTI for diverselatency and quality of service (QoS) requirements. For example, shorterTTI may be used for low latency and high reliability, while longer TTImay be used for higher spectral efficiency. The efficient multiplexingof long and short TTIs to allow transmissions to start on symbolboundaries. 5G NR also contemplates a self-contained integrated subframedesign with uplink or downlink scheduling information, data, andacknowledgement in the same subframe. The self-contained integratedsubframe supports communications in unlicensed or contention-basedshared spectrum, adaptive uplink or downlink that may be flexiblyconfigured on a per-cell basis to dynamically switch between uplink anddownlink to meet the current traffic needs.

For clarity, certain aspects of the apparatus and techniques may bedescribed below with reference to example 5G NR implementations or in a5G-centric way, and 5G terminology may be used as illustrative examplesin portions of the description below; however, the description is notintended to be limited to 5G applications.

Moreover, it should be understood that, in operation, wirelesscommunication networks adapted according to the concepts herein mayoperate with any combination of licensed or unlicensed spectrumdepending on loading and availability. Accordingly, it will be apparentto a person having ordinary skill in the art that the systems, apparatusand methods described herein may be applied to other communicationssystems and applications than the particular examples provided.

FIG. 1 is a block diagram illustrating details of an example wirelesscommunication system according to one or more aspects. The wirelesscommunication system may include wireless network 100. The wirelessnetwork 100 may, for example, include a 5G wireless network. Asappreciated by those skilled in the art, components appearing in FIG. 1are likely to have related counterparts in other network arrangementsincluding, for example, cellular-style network arrangements andnon-cellular-style-network arrangements, such as device-to-device,peer-to-peer or ad hoc network arrangements, among other examples.

The wireless network 100 illustrated in FIG. 1 includes a number of basestations 105 and other network entities. A base station may be a stationthat communicates with the UEs and may be referred to as an evolved nodeB (eNB), a next generation eNB (gNB), an access point, and the like.Each base station 105 may provide communication coverage for aparticular geographic area. In 3GPP, the term “cell” can refer to thisparticular geographic coverage area of a base station or a base stationsubsystem serving the coverage area, depending on the context in whichthe term is used. In implementations of the wireless network 100 herein,the base stations 105 may be associated with a same operator ordifferent operators, such as the wireless network 100 may include aplurality of operator wireless networks. Additionally, inimplementations of the wireless network 100 herein, the base stations105 may provide wireless communications using one or more of the samefrequencies, such as one or more frequency bands in licensed spectrum,unlicensed spectrum, or a combination thereof, as a neighboring cell. Insome examples, an individual base station 105 or UE 115 may be operatedby more than one network operating entity. In some other examples, eachbase station 105 and UE 115 may be operated by a single networkoperating entity.

A base station may provide communication coverage for a macro cell or asmall cell, such as a pico cell or a femto cell, or other types of cell.A macro cell generally covers a relatively large geographic area, suchas several kilometers in radius, and may allow unrestricted access byUEs with service subscriptions with the network provider. A small cell,such as a pico cell, would generally cover a relatively smallergeographic area and may allow unrestricted access by UEs with servicesubscriptions with the network provider. A small cell, such as a femtocell, would also generally cover a relatively small geographic area,such as a home, and, in addition to unrestricted access, may providerestricted access by UEs having an association with the femto cell, suchas UEs in a closed subscriber group (CSG), UEs for users in the home,and the like. A base station for a macro cell may be referred to as amacro base station. A base station for a small cell may be referred toas a small cell base station, a pico base station, a femto base stationor a home base station. In the example shown in FIG. 1, base stations105 d and 105 e are regular macro base stations, while base stations 105a-105 c are macro base stations enabled with one of 3 dimension (3D),full dimension (FD), or massive MIMO. Base stations 105 a-105 c takeadvantage of their higher dimension MIMO capabilities to exploit 3Dbeamforming in both elevation and azimuth beamforming to increasecoverage and capacity. Base station 105 f is a small cell base stationwhich may be a home node or portable access point. A base station maysupport one or multiple cells, such as two cells, three cells, fourcells, and the like.

The wireless network 100 may support synchronous or asynchronousoperation. For synchronous operation, the base stations may have similarframe timing, and transmissions from different base stations may beapproximately aligned in time. For asynchronous operation, the basestations may have different frame timing, and transmissions fromdifferent base stations may not be aligned in time. In some scenarios,networks may be enabled or configured to handle dynamic switchingbetween synchronous or asynchronous operations.

The UEs 115 are dispersed throughout the wireless network 100, and eachUE may be stationary or mobile. It should be appreciated that, althougha mobile apparatus is commonly referred to as user equipment (UE) instandards and specifications promulgated by the 3GPP, such apparatus mayadditionally or otherwise be referred to by those skilled in the art asa mobile station (MS), a subscriber station, a mobile unit, a subscriberunit, a wireless unit, a remote unit, a mobile device, a wirelessdevice, a wireless communications device, a remote device, a mobilesubscriber station, an access terminal (AT), a mobile terminal, awireless terminal, a remote terminal, a handset, a terminal, a useragent, a mobile client, a client, or some other suitable terminology.Within the present document, a “mobile” apparatus or UE need notnecessarily have a capability to move, and may be stationary. Somenon-limiting examples of a mobile apparatus, such as may includeimplementations of one or more of the UEs 115, include a mobile, acellular (cell) phone, a smart phone, a session initiation protocol(SIP) phone, a wireless local loop (WLL) station, a laptop, a personalcomputer (PC), a notebook, a netbook, a smart book, a tablet, and apersonal digital assistant (PDA). A mobile apparatus may additionally bean “Internet of things” (IoT) or “Internet of everything” (IoE) devicesuch as an automotive or other transportation vehicle, a satelliteradio, a global positioning system (GPS) device, a global navigationsatellite system (GNSS) device, a logistics controller, a drone, amulti-copter, a quad-copter, a smart energy or security device, a solarpanel or solar array, municipal lighting, water, or otherinfrastructure; industrial automation and enterprise devices; consumerand wearable devices, such as eyewear, a wearable camera, a smart watch,a health or fitness tracker, a mammal implantable device, a gesturetracking device, a medical device, a digital audio player (such as MP3player), a camera or a game console, among other examples; and digitalhome or smart home devices such as a home audio, video, and multimediadevice, an appliance, a sensor, a vending machine, intelligent lighting,a home security system, or a smart meter, among other examples. In oneaspect, a UE may be a device that includes a Universal IntegratedCircuit Card (UICC). In another aspect, a UE may be a device that doesnot include a UICC. In some aspects, UEs that do not include UICCs maybe referred to as IoE devices. The UEs 115 a-115 d of the implementationillustrated in FIG. 1 are examples of mobile smart phone-type devicesaccessing the wireless network 100. A UE may be a machine specificallyconfigured for connected communication, including machine typecommunication (MTC), enhanced MTC (eMTC), narrowband IoT (NB-IoT) andthe like. The UEs 115 e-115 k illustrated in FIG. 1 are examples ofvarious machines configured for communication that access 5G network100.

A mobile apparatus, such as the UEs 115, may be able to communicate withany type of the base stations, whether macro base stations, pico basestations, femto base stations, relays, and the like. In FIG. 1, acommunication link (represented as a lightning bolt) indicates wirelesstransmissions between a UE and a serving base station, which is a basestation designated to serve the UE on the downlink or uplink, or desiredtransmission between base stations, and backhaul transmissions betweenbase stations. Backhaul communication between base stations of thewireless network 100 may occur using wired or wireless communicationlinks.

In operation at the 5G network 100, the base stations 105 a-105 c servethe UEs 115 a and 115 b using 3D beamforming and coordinated spatialtechniques, such as coordinated multipoint (CoMP) or multi-connectivity.Macro base station 105 d performs backhaul communications with the basestations 105 a-105 c, as well as small cell, the base station 105 fMacro base station 105 d also transmits multicast services which aresubscribed to and received by the UEs 115 c and 115 d. Such multicastservices may include mobile television or stream video, or may includeother services for providing community information, such as weatheremergencies or alerts, such as Amber alerts or gray alerts.

The wireless network 100 of implementations supports mission criticalcommunications with ultra-reliable and redundant links for missioncritical devices, such the UE 115 e, which is a drone. Redundantcommunication links with the UE 115 e include from the macro basestations 105 d and 105 e, as well as small cell base station 105 f.Other machine type devices, such as UE 115 f (thermometer), the UE 115 g(smart meter), and the UE 115 h (wearable device) may communicatethrough the wireless network 100 either directly with base stations,such as the small cell base station 105 f, and the macro base station105 e, or in multi-hop configurations by communicating with another userdevice which relays its information to the network, such as the UE 115 fcommunicating temperature measurement information to the smart meter,the UE 115 g, which is then reported to the network through the smallcell base station 105 f. The 5G network 100 may provide additionalnetwork efficiency through dynamic, low-latency TDD or FDDcommunications, such as in a vehicle-to-vehicle (V2V) mesh networkbetween the UEs 115 i-115 k communicating with the macro base station105 e.

FIG. 2 is a block diagram illustrating examples of a base station 105and a UE 115 according to one or more aspects. The base station 105 andthe UE 115 may be one of the base stations and one of the UEs in FIG. 1.For a restricted association scenario (as mentioned above), the basestation 105 may be the small cell base station 105 f in FIG. 1, and theUE 115 may be the UE 115 c or 115 d operating in a service area of thebase station 105 f, which in order to access the small cell base station105 f, would be included in a list of accessible UEs for the small cellbase station 105 f. Additionally, the base station 105 may be a basestation of some other type. As shown in FIG. 2, the base station 105 maybe equipped with antennas 234 a through 234 t, and the UE 115 may beequipped with antennas 252 a through 252 r for facilitating wirelesscommunications.

At the base station 105, a transmit processor 220 may receive data froma data source 212 and control information from a controller 240. Thecontrol information may be for the physical broadcast channel (PBCH),physical control format indicator channel (PCFICH), physical hybrid-ARQ(automatic repeat request) indicator channel (PHICH), physical downlinkcontrol channel (PDCCH), enhanced physical downlink control channel(EPDCCH), or MTC physical downlink control channel (MPDCCH), among otherexamples. The data may be for the PDSCH, among other examples. Thetransmit processor 220 may process, such as encode and symbol map, thedata and control information to obtain data symbols and control symbols,respectively. Additionally, the transmit processor 220 may generatereference symbols, such as for the primary synchronization signal (PSS)and secondary synchronization signal (SSS), and cell-specific referencesignal. Transmit (TX) multiple-input multiple-output (MIMO) processor230 may perform spatial processing on the data symbols, the controlsymbols, or the reference symbols, if applicable, and may provide outputsymbol streams to modulators (MODs) 232 a through 232 t. For example,spatial processing performed on the data symbols, the control symbols,or the reference symbols may include precoding. Each modulator 232 mayprocess a respective output symbol stream, such as for OFDM, among otherexamples, to obtain an output sample stream. Each modulator 232 mayadditionally or alternatively process the output sample stream to obtaina downlink signal. For example, to process the output sample stream,each modulator 232 may convert to analog, amplify, filter, and upconvertthe output sample stream to obtain the downlink signal. Downlink signalsfrom modulators 232 a through 232 t may be transmitted via the antennas234 a through 234 t, respectively.

At the UE 115, the antennas 252 a through 252 r may receive the downlinksignals from the base station 105 and may provide received signals tothe demodulators (DEMODs) 254 a through 254 r, respectively. Eachdemodulator 254 may condition a respective received signal to obtaininput samples. For example, to condition the respective received signal,each demodulator 254 may filter, amplify, downconvert, and digitize therespective received signal to obtain the input samples. Each demodulator254 may further process the input samples, such as for OFDM, among otherexamples, to obtain received symbols. MIMO detector 256 may obtainreceived symbols from demodulators 254 a through 254 r, perform MIMOdetection on the received symbols if applicable, and provide detectedsymbols. Receive processor 258 may process the detected symbols, providedecoded data for the UE 115 to a data sink 260, and provide decodedcontrol information to a controller 280. For example, to process thedetected symbols, the receive processor 258 may demodulate,deinterleave, and decode the detected symbols.

On the uplink, at the UE 115, a transmit processor 264 may receive andprocess data (such as for the physical uplink shared channel (PUSCH))from a data source 262 and control information (such as for the physicaluplink control channel (PUCCH)) from the controller 280. Additionally,the transmit processor 264 may generate reference symbols for areference signal. The symbols from the transmit processor 264 may beprecoded by TX MIMO processor 266 if applicable, further processed bythe modulators 254 a through 254 r (such as for SC-FDM, among otherexamples), and transmitted to the base station 105. At base station 105,the uplink signals from the UE 115 may be received by antennas 234,processed by demodulators 232, detected by MIMO detector 236 ifapplicable, and further processed by receive processor 238 to obtaindecoded data and control information sent by the UE 115. The receiveprocessor 238 may provide the decoded data to data sink 239 and thedecoded control information to the controller 240.

The controllers 240 and 280 may direct the operation at the base station105 and the UE 115, respectively. The controller 240 or other processorsand modules at the base station 105 or the controller 280 or otherprocessors and modules at the UE 115 may perform or direct the executionof various processes for the techniques described herein, such as toperform or direct the execution illustrated in FIGS. 3-8, or otherprocesses for the techniques described herein. The memories 242 and 282may store data and program codes for the base station 105 and The UE115, respectively. Scheduler 244 may schedule UEs for data transmissionon the downlink or uplink.

In some cases, the UE 115 and the base station 105 may operate in ashared radio frequency spectrum band, which may include licensed orunlicensed, such as contention-based, frequency spectrum. In anunlicensed frequency portion of the shared radio frequency spectrumband, the UEs 115 or the base stations 105 may traditionally perform amedium-sensing procedure to contend for access to the frequencyspectrum. For example, the UE 115 or base station 105 may perform alisten-before-talk or listen-before-transmitting (LBT) procedure such asa clear channel assessment (CCA) prior to communicating in order todetermine whether the shared channel is available. A CCA may include anenergy detection procedure to determine whether there are any otheractive transmissions. For example, a device may infer that a change in areceived signal strength indicator (RSSI) of a power meter indicatesthat a channel is occupied. Specifically, signal power that isconcentrated in a certain bandwidth and exceeds a predetermined noisefloor may indicate another wireless transmitter. In someimplementations, a CCA may include detection of specific sequences thatindicate use of the channel. For example, another device may transmit aspecific preamble prior to transmitting a data sequence. In some cases,an LBT procedure may include a wireless node adjusting its own back offwindow based on the amount of energy detected on a channel or theacknowledge or negative-acknowledge (ACK or NACK) feedback for its owntransmitted packets as a proxy for collisions.

FIG. 3 is a block diagram of an example wireless communications system300 that supports RMSI repetition or RMSI slot aggregation according toone or more aspects. In some examples, the wireless communicationssystem 300 may implement aspects of the wireless network 100. Thewireless communications system 300 includes the UE 115 and the basestation 105. Although one UE 115 and one base station 105 areillustrated, in some other implementations, the wireless communicationssystem 300 may generally include multiple UEs 115, and may include morethan one base station 105.

The UE 115 can include a variety of components (such as structural,hardware components) used for carrying out one or more functionsdescribed herein. For example, these components can include one or moreprocessors 302 (hereinafter referred to collectively as “the processor302”), one or more memory devices 304 (hereinafter referred tocollectively as “the memory 304”), one or more transmitters 308(hereinafter referred to collectively as “the transmitter 308”), and oneor more receivers 310 (hereinafter referred to collectively as “thereceiver 310”). The processor 302 may be configured to executeinstructions stored in the memory 304 to perform the operationsdescribed herein. In some implementations, the processor 302 includes orcorresponds to one or more of the receive processor 258, the transmitprocessor 264, and the controller 280, and the memory 304 includes orcorresponds to the memory 282.

The memory 304 may be configured to store predetermined configurationinformation 306. In some implementations, the predeterminedconfiguration information 306 may be stored at the memory 304 prior torelease or sale of the UE 115. Additionally or alternatively, in someimplementations, the predetermined configuration information 306 isdefined in a 3rd Generation Partnership Project (3GPP) wirelesscommunication standard specification. The predetermined configurationinformation 306 may enable configuration of a particular CORESET at theUE 115 such as, for example, CORESET0. Additionally, the predeterminedconfiguration information 306 may include information mapping one ormore fields of messages included in a PDCCH or a PBCH to resourcesassociated with RMSI repetition or RMSI slot aggregation, as furtherdescribed herein.

The transmitter 308 is configured to transmit reference signals, controlinformation and data to one or more other devices, and the receiver 310is configured to receive reference signals, synchronization signals,control information and data from one or more other devices. Forexample, the transmitter 308 may transmit signaling, control informationand data to, and the receiver 310 may receive signaling, controlinformation and data from, the base station 105. In someimplementations, the transmitter 308 and the receiver 310 may beintegrated in one or more transceivers. Additionally or alternatively,the transmitter 308 or the receiver 310 may include or correspond to oneor more components of the UE 115 described with reference to FIG. 2.

The base station 105 can include a variety of components (such asstructural, hardware components) used for carrying out one or morefunctions described herein. For example, these components can includeone or more processors 352 (hereinafter referred to collectively as “theprocessor 352”), one or more memory devices 354 (hereinafter referred tocollectively as “the memory 354”), one or more transmitters 356(hereinafter referred to collectively as “the transmitter 356”), and oneor more receivers 358 (hereinafter referred to collectively as “thereceiver 358”). The processor 352 may be configured to executeinstructions stored in the memory 354 to perform the operationsdescribed herein. In some implementations, the processor 352 includes orcorresponds to one or more of the receive processor 238, the transmitprocessor 220, and the controller 240, and the memory 354 includes orcorresponds to the memory 242.

The transmitter 356 is configured to transmit reference signals,synchronization signals, control information, and data to one or moreother devices, and the receiver 358 is configured to receive referencesignals, control information and data from one or more other devices.For example, the transmitter 356 may transmit signaling, controlinformation and data to, and the receiver 358 may receive signaling,control information and data from, the UE 115. In some implementations,the transmitter 356 and the receiver 358 may be integrated in one ormore transceivers. Additionally or alternatively, the transmitter 356 orthe receiver 358 may include or correspond to one or more components ofbase station 105 described with reference to FIG. 2.

In some implementations, the wireless communications system 300implements a 5G NR network. For example, the wireless communicationssystem 300 may include multiple 5G-capable UEs 115 and multiple5G-capable base stations 105, such as UEs and base stations configuredto operate in accordance with a 5G NR network protocol such as thatdefined by the 3GPP.

During operation of the wireless communications system 300, the basestation 105 may determine to transmit RMSI to one or more UEs, such asthe UE 115, using RMSI repetition or RMSI slot aggregation. For example,the base station 105 may be configured to support RMSI repetition, RMSIslot aggregation, or both. To further illustrate, based on adetermination that there is RMSI, such as one or more RMSI messages, tobe transmitted, the base station 105 may determine to transmit the RMSIusing RMSI repetition or RMSI slot aggregation (or using both), such asbased on a configuration of the base station 105, a configuration of theUE 115, other information, or a combination thereof. Based on thedetermination, the base station 105 generates DCI 372 and transmits anRMSI PDCCH 370 to the UE 115 that includes the DCI 372. As used herein,an “RMSI PDCCH” includes or corresponds to a PDCCH that is designated orscheduled for communication of RMSI control information.

The DCI 372 includes or indicates one or more resources, one or moreparameters, or both resources and parameters, associated with RMSIrepetition or RMSI slot aggregation. In some implementations, the DCI372 includes one or more time resources (for example, one or moresymbols, one or more time slots, one or more frames, one or more othertime resources, or a combination thereof) associated with RMSIrepetition or RMSI slot aggregation, one or more frequency resources(for example one or more frequency bands, one or more frequencysubbands, one or more other frequency resources, or a combinationthereof) associated with RMSI repetition or RMSI slot aggregation, oneor more keying modes associated with RMSI repetition or RMSI slotaggregation, or a combination thereof. For example, the DCI 372 mayindicate one or more timeslots during which RMSI repetitions or portionsof a divided RMSI message are to be transmitted, one or more frequencybands or subbands via which RMSI repetitions or portions of a dividedRMSI message are to be transmitted, a keying mode, such as quadraturephase shift keying (QPSK), used to transmit RMSI repetitions or portionsof a divided RMSI message, other resources or parameters, or acombination thereof. In some other implementations, the DCI 372 mayinclude one or more values that map to the one or more resources, theone or more parameters, or both, as further described herein.

The UE 115 may monitor one or more channels to receive the RMSI PDCCH370. In some implementations, the base station 105 transmits the RMSIPDCCH 370 within a particular PDCCH common search space, such as aType0-PDCCH common search space, as a non-limiting example. TheType0-PDCCH common search space is a subset of the NR PDCCH search spacethat is dedicated to the communication of system information messages,such as system information blocks (SIBs). In some implementations, thepredetermined configuration information 306 indicates the resources orparameters associated with the Type0-PDCCH common search space. Becausethe Type0-PDCCH common search space is known to the UE 115, based on thepredetermined configuration information 306, the UE 115 may monitor theType0-PDCCH common search space to detect the RMSI PDCCH 370.

The UE 115 receives the RMSI PDCCH 370 and processes the DCI 372. The UE115 may monitor for one or more RMSI PDSCHs based on the configurationof resources associated with RMSI repetition or RMSI slot aggregationindicated by the DCI 372. For example, the UE 115 may monitor afrequency band indicated by the DCI 372 at a time indicated by the DCI372, as a non-limiting example. The base station 105 may transmit anRMSI PDSCH 374 to the UE 115 using the resources indicated by the DCI372 and the UE 115 may receive and process the RMSI PDSCH 374 based onthe monitoring. As used herein, an RMSI PDSCH includes or corresponds toa PDSCH that is designated or scheduled for communication of one or moreRMSI messages.

The RMSI PDSCH 374 may include RMSI repetitions 376, a divided RMSImessage 378, or both. For example, in implementations in which only oneof RMSI repetition or RMSI slot aggregation is supported, used orconfigured for a given transmission, either the RMSI repetitions 376 orthe divided RMSI message 378 may be included in the RMSI PDSCH 374,according to which of RMSI repetition or RMSI slot aggregation issupported, used or configured. In implementations in which both RMSIrepetition and RMSI slot aggregation are supported, used or configured,the RMSI repetitions 376 and the divided RMSI message 378 are bothincluded in the RMSI PDSCH 374 and are transmitted during differentslots of a frame (or multiple frames).

As described above, in implementations that support RMSI repetition, theRMSI repetitions 376 may include an RMSI message and one or morerepetitions, such as copies, of the RMSI message. In someimplementations, each of the RMSI message and the one or morerepetitions of the RMSI message may be included in a respectivetransport block (TB) that is communicated via the RMSI PDSCH 374. Forexample, the RMSI message may be included in a first TB of the RMSIPDSCH 374, and each of the one or more repetitions of the RMSI messagemay be included in a respective other TB of the RMSI PDSCH 374. The basestation 105 may transmit the different TBs of the RMSI PDSCH 374 duringdifferent slots of a frame. For example, the base station 105 maytransmit the first TB during a first slot of a frame, and the basestation 105 may transmit each of the other TBs during a respective otherslot of the frame.

The UE 115 may receive one or more of the RMSI message and one or moreof the repetitions. The UE 115 may process the first of the RMSI messageor repetitions that is successfully received, and the UE 115 may discardany additional repetitions that are received. Alternatively, the UE 115may use one or more additional repetitions of the RMSI message that aresuccessfully received to confirm or verify the RMSI message orrepetition that was first successfully received. In someimplementations, after transmitting the RMSI message and the one or morerepetitions, the base station 105 may transmit a second RMSI message andone or more repetitions of the second RMSI message via the RMSI PDSCH374, or via one or more other RMSI PDSCHs.

As described above, in implementations that support RMSI slotaggregation, the divided RMSI message 378 may include multiple portionsof a single RMSI message. In some implementations, each portion of thedivided RMSI message 378 may be included in a respective TB communicatedvia the RMSI PDSCH 374. For example, the base station 105 may transmit afirst TB that includes a first portion of the divided RMSI message 378and one or more other TBs that each include a respective other portionof the divided RMSI message 378. The base station 105 may transmit theTBs via the RMSI PDSCH 374. The base station 105 may transmit thedifferent TBs of the RMSI PDSCH 374 during different slots of a frame.For example, the base station 105 may transmit the first TB during afirst slot of a frame, and the base station 105 may transmit each of theother TBs during a respective other slot of the frame. The UE 115 maymonitor the RMSI PDSCH 374 to receive the portions of the divided RMSImessage 378.

After receiving one or more of the portions of the divided RMSI message378, the UE 115 may aggregate the received portions to construct a fullRMSI message. For example, the UE 115 may aggregate the first portionand the other portions to construct, or otherwise form, the divided RMSImessage 378. Aggregating portions of the divided RMSI message 378 mayinclude combining payloads extracted from the TBs included in the RMSIPDSCH 374 to reconstruct the divided RMSI message 378. In someimplementations, after transmitting the divided RMSI message 378, thebase station 105 may transmit a second divided RMSI message via the RMSIPDSCH 374, or via one or more other RMSI PDSCHs, during differentrespective slots of one or more other frames.

As described above, in some implementations, the DCI 372 includes theconfiguration of the resources associated with RMSI repetition or RMSIslot aggregation. In some other implementations, the DCI 372 includesone or more values that map to the configuration of resources associatedwith RMSI repetition or RMSI slot aggregation. In some suchimplementations, the base station 105 may transmit one or moreconfiguration messages via a PBCH that indicate the mapping. Toillustrate, the base station 105 may transmit, to the UE 115, a PBCH 380that includes a configuration message 382 associated with a particularCORESET such as, for example, CORESET0. For example, the base station105 may transmit the configuration message 382 via the PBCH 380 duringconfiguration of the particular CORESET at the UE 115. One or morefields of the configuration message 382 may indicate a mapping between avalue of one or more fields of the DCI 372 and resources, parameters, orboth resources and parameters associated with RMSI repetition or RMSIslot aggregation. For example, a multi-bit value, such as a two- orthree-bit value, of a field of the DCI 372 may be associated with aparticular resource configuration used to perform RMSI repetition orRMSI slot aggregation, and this association may be indicated by aportion of the configuration message 382. Additionally, theconfiguration message 382 may indicate information used to enableconfiguration of the particular CORESET, such as CORESET0, at the UE115.

In some other implementations, a mapping of the values of the one ormore fields of the DCI 372 to the configuration of resources associatedwith RMSI repetition or RMSI slot aggregation is indicated in anothermanner. In one such example, one or more reserved bits of a PBCH mayindicate the mapping. For example, the PBCH 380 may include reservedbits 384 that indicate the configuration of resources associated withRMSI repetition or RMSI slot aggregation and the mapping between theconfiguration of resources and values of the one or more fields of theDCI 372. Although described as reserved bits of the PBCH 380, suchreserved bits may be included in a message communicated via the PBCH380, such as the configuration message 382 or another type of message.The reserved bits 384 may be designated as reserved in a previousversion of a 3GPP wireless communication standard specification.

As another example, the PBCH 380 may include the configuration message382, and one or more fields of the configuration message 382 mayindicate the mapping of the values of the one or more fields of the DCI372 to the resource configuration associated with RMSI repetition orRMSI slot aggregation, in addition to the information enablingconfiguration of the particular CORESET at the UE 115. In some suchimplementations, instead of including the mapping information in theconfiguration message 382, one or more fields of the configurationmessage 382 may be interpretable, by the UE 115, to indicate themappings. For example, values of the one or more fields of theconfiguration message 382 may be associated with a respective mapping tobe used by the UE 115 to determine the resource configuration to use toreceive RMSI repetitions or a divided RMSI message across multipleslots. As such, the respective mapping may be designated by informationdistinct from the information included in the configuration message 382.

In some implementations, the UE 115 interprets the one or more fields ofthe configuration message 382 based on the predetermined configurationinformation 306 stored at the memory 304. The predeterminedconfiguration information 306 includes information that enablesconfiguration of one or more CORESETs, such as CORESET0. In someimplementations, the predetermined configuration information 306includes or corresponds to one or more tables. Rows and columns of thetables indicate information used to configure one or more CORESETs atthe UE 115, such as resources or parameters associated with theCORESETs. In some implementations, the one or more tables includeinformation for configuring at least CORESET0. In some implementations,the one or more tables include or correspond to configuration tables ofPDCCH monitoring occasions for the Type0-PDCCH common space and includeinformation for synchronization signals (SS) and PBCH block and CORESETmultiplexing for a particular pattern and a particular frequency range,such as pattern 1 and frequency range 2.

In some implementations, a table of the predetermined configurationinformation 306 includes a first column that indicates a firstinterpretation of the one or more fields of the configuration message382 that is to be used by legacy UEs (also referred to herein as a firsttype of UEs) that do not support RMSI repetition or RMSI slotaggregation. The first column may be referred to as a “regular” columnof the table and may include mappings for resource configurations usedto receive a single RMSI message during a single slot of a frame. Thetable also includes a second column that indicates a secondinterpretation of the one or more fields that is to be used by UEsconfigured to support RMSI repetition or RMSI slot aggregation (alsoreferred to herein as a second type of UEs). The second column may bereferred to as a “special” column and may include mappings for resourceconfigurations used to receive repetitions of RMSI messages or a dividedRMSI message across multiple slots of a frame.

If a legacy UE receives the configuration message 382, the legacy UE mayinterpret the one or more fields of the configuration message 382 basedon the regular column, and may ignore the special column. However, if aUE that is configured to support RMSI repetition or RMSI slotaggregation, such as the UE 115, receives the configuration message 382,the UE 115 may interpret the one or more fields of the configurationmessage 382 based on the special column. For example, a field of theconfiguration message 382 may include the value “0111,” and the UE 115may interpret “0111” based on the special column of the table of thepredetermined configuration information 306 to determine that RMSIrepetition or RMSI slot aggregation is to be used and to identify aconfiguration of resources, indicated by the table, that is associatedwith RMSI repetition or RMSI slot aggregation. The predeterminedconfiguration information 306, including the table, may be specified bya 3GPP wireless communication standard specification, or anotherwireless communication standard specification. In this manner, UEs thatare configured to support RMSI repetition or RMSI slot aggregation maydetermine the respective resource configurations by interpreting theconfiguration message 382 based on the predetermined configurationinformation 306 to identify a particular resource configuration thatmaps to the values of one or more fields of the DCI 372. Additionally,legacy UEs may determine a resource configuration associated withtransmission of a single RMSI message by interpreting a theconfiguration message 382 based on the predetermined configurationinformation 306 to identify a particular resource configuration thatmaps to one or more values of the DCI 372.

As described with reference to FIG. 3, the present disclosure providestechniques for enabling RMSI repetition or RMSI slot aggregation. Forexample, the DCI 372 may indicate a resource configuration associatedwith RMSI repetition or RMSI slot aggregation that is used to transmitthe RMSI PDSCH 374, which includes the RMSI repetitions 376, the dividedRMSI message 378, or both (if both RMSI repetition and RMSI slotaggregation are configured). By using RMSI repetition or RMSI slotaggregation, a likelihood that UEs, such as the UE 115, receive theinformation in an RMSI message is increased because there are moreopportunities (via different repetitions or different portions acrossdifferent slots) for the UEs to successfully receive and decode theinformation. In this manner, coverage of the RMSI messages is improved,which may enable communications to and from UEs at the edge of acoverage area of the wireless communications system 300.

FIGS. 4A and 4B are timelines of examples of RMSI repetition and RMSIslot aggregation, respectively, according to one or more aspects. FIG.4A depicts a timeline 400 that illustrates an example of RMSI repetitionas described above. In the example of FIG. 4A, an illustrative frameincludes ten slots. In other implementations, a frame may include fewerthan ten or more than ten slots. As described above, a base station maytransmit, and a UE may receive, multiple repetitions of an RMSI messageduring respective slots of the frame. For example, as shown in FIG. 4A,the UE may receive one or more of a first RMSI repetition 402 during afirst slot (slot 0), a second RMSI repetition 404 during a fourth slot(slot 3), a third RMSI repetition 406 during a seventh slot (slot 6),and a fourth RMSI repetition 408 during a tenth slot (slot 9). During asecond, third, fifth, sixth, eighth, and ninth slot, no RMSI repetitionsmay be transmitted or received. In such an example, the DCI 372 of FIG.3 may indicate RMSI repetition and the first, fourth, seventh, and tenthslots, as described above. Each of the RMSI repetitions 402, 404, 406,and 408 may be an individual copy or repetition of the same RMSImessage, such that each of the RMSI repetitions 402, 404, 406, and 408includes the same information. In other implementations, the RMSIrepetition may occur more than four or fewer than four times and mayoccur during different slots than shown in FIG. 4A. Use of RMSIrepetition may enable UEs, such as UEs at an edge of a coverage area, toreceive RMSI by receiving only one (or less than all) of multiplerepetitions of an RMSI message.

FIG. 4B depicts a timeline 410 that illustrates an example of RMSI slotaggregation as described above. In the example of FIG. 4B, anillustrative frame includes ten slots. In other implementations, a framemay include fewer than ten or more than ten slots. As described above, abase station may divide an RMSI message into multiple differentportions, and the base station may transmit, and a UE may receive, theportions of the RMSI message during respective slots of the frame. Forexample, as shown in FIG. 4B, the base station may transmit a first RMSIportion 412 during a first slot (slot 0), a second RMSI portion 414during a third slot (slot 2), a fourth RMSI portion 416 during a fifthslot (slot 4), a fourth RMSI portion 418 during a seventh slot (slot 6),and a fifth RMSI portion 420 during a ninth slot (slot 8). During asecond, fourth, sixth, eighth, and tenth slot, no RMSI portions may betransmitted or received. In such an example, the DCI 372 of FIG. 3 mayindicate RMSI slot aggregation and the first, third, fifth, seventh, andninth slots, as described above. Each of the RMSI portions 412, 414,416, 418, and 420 may represent respective parts of a single RMSImessage. For example, the base station may divide an RMSI message intofive distinct portions, such that all (or some) of the RMSI portions412-420 include the different information. In other implementations, thebase station may divide the RMSI message into more than five or fewerthan five portions for transmission during different slots than shown inFIG. 4B. The UE may construct the RMSI message by aggregating the firstRMSI portion 412, the second RMSI portion 414, the third RMSI portion416, the fourth RMSI portion 418, and the fifth RMSI portion 420. If theUE fails to successfully receive at least one of the RMSI portions412-420, the UE may aggregate the successfully received portions toconstruct a partial RMSI message. Thus, use of RMSI slot aggregation mayimprove coverage at UEs, such as UEs at an edge of a coverage area, dueto the ability to construct at least a partial RMSI message based on thereceived RMSI portions, as compared to missing an entirety of an RMSImessage if the UEs fail to receive the single RMSI message at thescheduled time.

FIG. 5 is a flow diagram illustrating an example process 500 thatsupports RMSI repetition or RMSI slot aggregation according to one ormore aspects. Operations of the process 500 may be performed by a UE,such as the UE 115 described above with reference to FIGS. 1-3. Forexample, example operations (also referred to as “blocks”) of theprocess 500 may enable the UE to receive one or more RMSI messages thatare transmitted using RMSI repetition or RMSI slot aggregation,according to some aspects of the present disclosure.

FIG. 6 is a block diagram of an example UE 600 that supports RMSIrepetition or RMSI slot aggregation according to one or more aspects.The UE 600 may be configured to perform operations, including the blocksof the process 500 described with reference to FIG. 5, to receive one ormore RMSI messages that are transmitted using RMSI repetition or RMSIslot aggregation. In some implementations, the UE 600 includes thestructure, hardware, and components shown and described with referenceto the UE 115 of FIG. 2 or 3. For example, the UE 600 includes thecontroller 280, which operates to execute logic or computer instructionsstored in the memory 282, as well as controlling the components of theUE 600 that provide the features and functionality of the UE 600. The UE600, under control of the controller 280, transmits and receives signalsvia wireless radios 601 a-r and the antennas 252 a-r. The wirelessradios 601 a-r include various components and hardware, as illustratedin FIG. 2 for the UE 115, including the modulator and demodulators 254a-r, the MIMO detector 256, the receive processor 258, the transmitprocessor 264, and the TX MIMO processor 266.

As shown, the memory 282 may include receive logic 602 and monitoringlogic 603. The receive logic 602 and the monitoring logic 603 mayinclude or correspond to the processor 302, the memory 304, and thereceiver 310. The receive logic 602 may be configured to enable receipt,by the UE 600, of one or more signals. The monitoring logic 603 may beconfigured to enable the UE 600 to monitor one or more channels forreceipt of one or more RMSI messages. The UE 600 may receive signalsfrom or transmit signals to one or more base stations, such as the basestation 105 of FIGS. 1-3 or a base station as illustrated in FIG. 8.

Referring back to the process 500 of FIG. 5, in block 502, the UE 600receives, from a base station, an RMSI PDCCH that includes DCI. The DCIindicates a configuration of resources associated with RMSI repetitionor RMSI slot aggregation. For example, the UE 600 may receive an RMSIPDCCH via the wireless radios 601 a-r and the antennas 252 a-r. Tofurther illustrate, the UE 600 may execute, under control of thecontroller 280, the receive logic 602 stored in the memory 282. Theexecution environment of the receive logic 602 provides thefunctionality to receive an RMSI PDCCH that includes DCI from a basestation. The DCI includes a configuration of resources associated withRMSI repetition or RMSI slot aggregation.

In block 504, the UE 600 monitors for one or more RMSI messages based onthe configuration of resources indicated in the DCI. The monitoring inblock 504 includes monitoring for multiple repetitions of an RMSImessage based on the configuration of resources being associated withRMSI repetition and monitoring for a single RMSI message that is dividedacross multiple slots based on the configuration of resources beingassociated with RMSI slot aggregation. To illustrate, the UE 600 mayexecute, under control of the controller 280, the monitoring logic 603stored in the memory 282. The execution environment of the monitoringlogic 603 provides the functionality to monitor for one or more RMSImessages based on the configuration of resources. In someimplementations, the configuration of resources includes one or moretime resources (for example, one or more symbols, one or more timeslots, one or more frames, other time resources, or a combinationthereof) associated with RMSI repetition or RMSI slot aggregation, oneor more frequency resources (for example, one or more frequency bands,one or more frequency subbands, other frequency resources, or acombination thereof) associated with RMSI repetition or RMSI slotaggregation, one or more keying modes (for example, binary phase shiftkeying (BPSK) or quadrature phase shift keying (QPSK)) associated withRMSI repetition or RMSI slot aggregation, or a combination thereof.

In implementations in which the configuration of resources is associatedwith RMSI repetition, the process 500 further includes receiving, fromthe base station based on the monitoring in block 504, an RMSI PDSCHthat includes multiple TBs including the multiple repetitions of theRMSI message. In some such implementations, each repetition of the RMSImessage is included in a respective TB of the multiple TBs. In some suchimplementations, receiving the RMSI PDSCH includes receiving the each TBof the multiple TBs during a respective slot of a frame.

In implementations in which the configuration of resources is associatedwith RMSI slot aggregation, the process 500 further includes receiving,from the base station based on the monitoring in block 504, multiple TBsincluding via an RMSI PDSCH. Each TB of the multiple TBs includes arespective portion of the single RMSI message. In some suchimplementations, each TB of the multiple TBs is received during arespective slot of a frame. In some such implementations, the process500 further includes aggregating the portions of the single RMSI messagethat are included in the multiple TBs to construct the single RMSImessage.

In some implementations, the process 500 further includes monitoring aType0-PDCCH common search space. Receiving the RMSI PDCCH is based onthe monitoring. Additionally or alternatively, the process 500 mayinclude receiving, from the base station, a PBCH that includes aconfiguration message associated with a particular CORESET. One or morefields of the configuration message may indicate a mapping between avalue of one or more fields of the DCI and resources, parameters, orboth resources and parameters associated with RMSI repetition or RMSIslot aggregation. In some such implementations, the particular CORESETis CORESET0. Alternatively, the PBCH may include one or more reservedbits indicating the configuration of resources associated with RMSIrepetition or RMSI slot aggregation.

In some other implementations in which the process 500 further includesreceiving a PBCH that includes a configuration message associated with aparticular CORESET, the process 500 further includes interpreting one ormore fields of the configuration message based on predeterminedconfiguration information stored at the UE 600. In some suchimplementations, the predetermined configuration information includes atable. As described above, a first column of the table may indicate afirst interpretation of the one or more fields that is to be used by afirst type of UEs, such as legacy UEs, and a second column of the tablemay indicate a second interpretation of the one or more fields that isto be used by a second type of UEs, such as UEs configured to supportRMSI repetition or RMSI slot aggregation, such as the UE 600. In somesuch implementations, the predetermined configuration informationindicates a mapping between a value of one or more fields of the DCIreceived in block 502 and resources, parameters, or both resources andparameters associated with RMSI repetition or RMSI slot aggregation usedfor transmitting the RMSI message the UE 600 is monitoring for in block504. As described above, the particular CORESET may be CORESET0 and thepredetermined configuration information may be specified by a 3GPPwireless communication standard specification.

FIG. 7 is a flow diagram illustrating an example process 700 thatsupports RMSI repetition or RMSI slot aggregation according to one ormore aspects. Operations of the process 700 may be performed by a basestation, such as the base station 105 described above with reference toFIGS. 1-3. For example, example operations of the process 700 may enablea base station to transmit, to one or more UEs, an RMSI PDSCH thatincludes multiple repetitions of an RMSI message or a single RMSImessage that is divided across multiple slots.

FIG. 8 is a block diagram of an example base station 800 that supportsRMSI repetition or RMSI slot aggregation according to one or moreaspects. The base station 800 may be configured to perform operations,including the blocks of the process 700 described with reference to FIG.7, to transmit, and enable one or more UEs to receive, one or more RMSImessages using RMSI repetition or RMSI slot aggregation. In someimplementations, the base station 800 includes the structure, hardware,and components shown and described with reference to the base station105 of FIGS. 1-3. For example, the base station 800 may include thecontroller 240, which operates to execute logic or computer instructionsstored in the memory 242, as well as controlling the components of thebase station 800 that provide the features and functionality of the basestation 800. The base station 800, under control of the controller 240,transmits and receives signals via wireless radios 801 a-t and theantennas 234 a-t. The wireless radios 801 a-t include various componentsand hardware, as illustrated in FIG. 2 for the base station 105,including the modulator and demodulators 232 a-t, the transmit processor220, the TX MIMO processor 230, the MIMO detector 236, and the receiveprocessor 238.

As shown, the memory 242 may include RMSI determination logic 802, DCIgeneration logic 803, and transmission logic 804. The RMSI determinationlogic 802, the DCI generation logic 803, and the transmission logic 804may include or correspond to the processor 352, the memory 354, and thetransmitter 356. The RMSI determination logic 802 may be configured todetermine to transmit RMSI using RMSI repetition or RMSI slotaggregation. The DCI generation logic 803 may be configured to generateDCI that indicates a configuration of resources associated with RMSIrepetition or RMSI slot aggregation. The transmission logic 804 isconfigured to transmit the DCI via an RMSI PDCCH and to transmit an RMSIPDSCH that includes multiple repetitions of an RMSI message or a singleRMSI message that is divided across multiple slots. The base station 800may receive signals from or transmit signals to one or more UEs, such asthe UE 115 of FIGS. 1-3 or the UE 600 of FIG. 6.

Referring back to the process 700 of FIG. 7, in block 702, the basestation 800 determines to transmit RMSI to one or more UEs using RMSIrepetition or RMSI slot aggregation. To illustrate, the base station 800may execute, under control of the controller 240, the RMSI determinationlogic 802 stored in the memory 242. The execution environment of theRMSI determination logic 802 provides the functionality to determine totransmit RMSI to one or more UEs using RMSI repetition or RMSI slotaggregation.

In block 704, the base station 800 generates DCI that indicates aconfiguration of resources associated with RMSI repetition or RMSI slotaggregation. To illustrate, the base station 800 may execute, undercontrol of the controller 240, the DCI generation logic 803 stored inthe memory 242. The execution environment of the DCI generation logic803 provides the functionality to generate DCI that indicates aconfiguration of resources associated with RMSI repetition or RMSI slotaggregation.

In block 706, the base station 800 transmits, to the one or more UEs,the DCI via an RMSI PDCCH. To illustrate, the base station 800 mayexecute, under control of the controller 240, the transmission logic 804stored in the memory 242. The execution environment of the transmissionlogic 804 provides the functionality to transmit, to the one or moreUEs, the DCI via an RMSI PDCCH.

In block 708, the base station 800 transmits, to the one or more UEs, anRMSI PDSCH that includes multiple repetitions of an RMSI message basedon determining to transmit the RMSI using RMSI repetition and a singleRMSI message that is divided across multiple slots based on determiningto transmit the RMSI using RMSI slot aggregation. To illustrate, thebase station 800 may execute, under control of the controller 240, thetransmission logic 804 stored in the memory 242. The executionenvironment of the transmission logic 804 provides the functionality totransmit, to the one or more UEs, an RMSI PDSCH that includes multiplerepetitions of an RMSI message based on determining to transmit the RMSIusing RMSI repetition and a single RMSI message that is divided acrossmultiple slots based on determining to transmit the RMSI using RMSI slotaggregation. In some implementations, blocks 702 and 704 are optional,and the process 700 may include the transmission operations describedwith reference to blocks 706 and 708, such as transmitting an RMSI PDCCHthat includes DCI indicating a configuration of resources associatedwith RMSI repetition or RMSI slot aggregation and transmitting an RMSIPDSCH over the resources using RMSI repetition or RMSI slot aggregationaccording to the configuration of resources.

In some implementations, the configuration of resources includes one ormore time resources (for example, one or more symbols, one or more timeslots, one or more frames, other time resources, or a combinationthereof) associated with RMSI repetition or RMSI slot aggregation, oneor more frequency resources (for example, one or more frequency bands,one or more frequency subbands, other frequency resources, or acombination thereof) associated with RMSI repetition or RMSI slotaggregation, one or more keying modes (for example, binary phase shiftkeying (BPSK) or quadrature phase shift keying (QPSK)) associated withRMSI repetition or RMSI slot aggregation, or a combination thereof.

In implementations in which the DCI indicates that the configuration ofresources is associated with RMSI repetition, the RMSI message isincluded in a first TB of the RMSI PDSCH, and each of one or morerepetitions of the RMSI message is included in a respective other TB ofthe RMSI PDSCH. In some such implementations, the first TB istransmitted during a first slot of a frame and each of the other TBs istransmitted during a respective other slot of the frame.

In implementations in which the DCI indicates that the configuration ofresources is associated with RMSI slot aggregation, the transmitting inblock 708 includes transmitting a first TB including a first portion ofthe single RMSI message via the RMSI PDSCH and transmitting one or moreother TBs each including a respective other portion of the single RMSImessage via the RMSI PDSCH. In some such implementations, the first TBis transmitted during a first slot of a frame and each of the other TBsis transmitted during a respective other slot of the frame.

In some implementations, the RMSI PDCCH is transmitted within aType0-PDCCH common search space. Additionally or alternatively, theprocess 700 may include transmitting, to the one or more UEs, a PBCHthat includes a configuration message associated with a particularCORESET. One or more fields of the configuration message may indicate amapping between a value of one or more fields of the DCI and resources,parameters, or both resources and parameters associated with RMSIrepetition or RMSI slot aggregation. In some such implementations, theparticular CORESET is CORESET0. Alternatively, the PBCH may include oneor more reserved bits indicating the configuration of resourcesassociated with RMSI repetition or RMSI slot aggregation.

In some other implementations in which the process 700 further includestransmitting a PBCH that includes a configuration message associatedwith a particular CORESET, one or more fields of the configurationmessage are interpretable based on predetermined configurationinformation stored at the UE. In some such implementations, thepredetermined configuration information includes a table. As describedabove-a first column of the table may indicate a first interpretation ofthe one or more fields that is to be used by a first type of UEs, suchas legacy UEs, and a second column of the table may indicate a secondinterpretation of the one or more fields that is to be used by a secondtype of UEs, such as UEs configured to support RMSI repetition or RMSIslot aggregation. In some such implementations, the predeterminedconfiguration information indicates a mapping between a value of one ormore fields of the DCI and resources, parameters, or both resources andparameters corresponding to RMSI repetition or RMSI slot aggregationused for transmitting the RMSI message in block 708. As described above,the particular CORESET may be CORESET0 and the predeterminedconfiguration information may be specified by a 3GPP wirelesscommunication standard specification.

It is noted that one or more blocks (or operations) described withreference to FIGS. 5 and 7 may be combined with one or more blocks (oroperations) described with reference to another of the figures. Forexample, one or more blocks (or operations) of FIG. 5 may be combinedwith one or more blocks (or operations) of FIG. 7. As another example,one or more blocks associated with FIG. 5 or 7 may be combined with oneor more blocks (or operations) associated with FIG. 2 or 3.Additionally, or alternatively, one or more operations described abovewith reference to FIGS. 1-7 may be combined with one or more operationsdescribed with reference to FIG. 8.

In some aspects, techniques for enabling RMSI repetition or RMSI slotaggregation may include additional aspects, such as any single aspect orany combination of aspects described below or in connection with one ormore other processes or devices described elsewhere herein. In someaspects, enabling RMSI repetition or RMSI slot aggregation may includean apparatus configured to receive, from a base station, an RMSI PDCCHthat includes DCI. The DCI indicates a configuration of resourcesassociated with RMSI repetition or RMSI slot aggregation. The apparatusis also configured to monitor for one or more RMSI messages based on theconfiguration of resources. The monitoring includes monitoring formultiple repetitions of an RMSI message based on the configuration ofresources being associated with RMSI repetition and monitoring for asingle RMSI message that is divided across multiple slots based on theconfiguration of resources being associated with RMSI slot aggregation.In some implementations, the apparatus includes a wireless device, suchas a UE or a component of a UE. In some implementations, the apparatusmay include at least one processor, and a memory coupled to theprocessor. The processor may be configured to perform operationsdescribed herein with respect to the wireless device. In some otherimplementations, the apparatus may include a non-transitorycomputer-readable medium having program code recorded thereon and theprogram code may be executable by a computer for causing the computer toperform operations described herein with reference to the wirelessdevice. In some implementations, the apparatus may include one or moremeans configured to perform operations described herein.

In a first aspect, the configuration of resources includes one or moretime resources associated with RMSI repetition or RMSI slot aggregation,one or more frequency resources associated with RMSI repetition or RMSIslot aggregation, one or more keying modes associated with RMSIrepetition or RMSI slot aggregation, or a combination thereof.

In a second aspect, alone or in combination with the first aspect, theconfiguration of resources is associated with RMSI repetition and theapparatus receives, from the base station, an RMSI PDSCH that includesmultiple TBs including the multiple repetitions of the RMSI message.

In a third aspect, in combination with the second aspect, eachrepetition of the RMSI message is included in a respective TB of themultiple TBs.

In a fourth aspect, in combination with the third aspect, the apparatusreceives each TB of the multiple TBs during a respective slot of aframe.

In a fifth aspect, alone or in combination with one or more of the firstthrough fourth aspects, the configuration of resources is associatedwith RMSI slot aggregation and the apparatus receives, from the basestation, multiple TBs via an RMSI PDSCH. Each TB of the multiple TBsinclude a respective portion of the single RMSI message.

In a sixth aspect, in combination with the fifth aspect, the apparatusreceives each TB of the multiple TBs during a respective slot of aframe.

In a seventh aspect, in combination with the fifth aspect, the apparatusaggregates the portions of the single RMSI message that are included inthe multiple TBs to construct the single RMSI message.

In an eighth aspect, alone or in combination with one or more of thefirst through seventh aspects, the apparatus monitors a Type0-PDCCHcommon search space. The RMSI PDCCH is received based on the monitoring.

In a ninth aspect, alone or in combination with one or more of the firstthrough eighth aspects, the apparatus receives, from the base station, aPBCH that includes a configuration message associated with a particularCORESET. One or more fields of the configuration message indicate amapping between a value of one or more fields of the DCI and resources,parameters, or both resources and parameters associated with RMSIrepetition or RMSI slot aggregation.

In a tenth aspect, in combination with the ninth aspect, the particularCORESET is CORESET0.

In an eleventh aspect, alone or in combination with one or more of thefirst through tenth aspects, the apparatus receives, from the basestation, a PBCH. One or more reserved bits of the PBCH indicate theconfiguration of resources associated with RMSI repetition or RMSI slotaggregation.

In a twelfth aspect, alone or in combination with one or more of thefirst through eleventh aspects, the apparatus receives, from the basestation, a PBCH that includes a configuration message associated with aparticular CORESET and interprets one or more fields of theconfiguration message based on predetermined configuration informationstored at the UE.

In a thirteenth aspect, in combination with the twelfth aspect, thepredetermined configuration information includes a table, a first columnof the table indicates a first interpretation of the one or more fieldsthat is to be used by a first type of UEs, and a second column of thetable indicates a second interpretation of the one or more fields thatis to be used by a second type of UEs that are configured to supportRMSI repetition or RMSI slot aggregation.

In a fourteenth aspect, alone or in combination with one or more of thetwelfth through thirteenth aspects, the predetermined configurationinformation indicates a mapping between a value of one or more fields ofthe DCI and resources, parameters, or both resources and parametersassociated with RMSI repetition or RMSI slot aggregation.

In a fifteenth aspect, alone or in combination with one or more of thetwelfth through fourteenth aspects, the particular CORESET is CORESET0.

In a sixteenth aspect, alone or in combination with one or more of thetwelfth through fifteenth aspects, the predetermined configurationinformation is specified by a 3GPP wireless communication standardspecification.

In some aspects, an apparatus configured for wireless communication,such as a base station, is configured to determine to transmit RMSI toone or more UEs using RMSI repetition or RMSI slot aggregation. Theapparatus is also configured to generate DCI that indicates aconfiguration of resources associated with RMSI repetition or RMSI slotaggregation. The apparatus is configured to transmit, to the one or moreUEs, the DCI via an RMSI PDCCH. The apparatus is further configured totransmit, to the one or more UEs, an RMSI PDSCH that includes multiplerepetitions of an RMSI message based on determining to transmit the RMSIusing RMSI repetition and a single RMSI message divided across multipleslots based on determining to transmit the RMSI using RMSI slotaggregation. In some implementations, the apparatus includes a wirelessdevice, such as a base station. In some implementations, the apparatusmay include at least one processor, and a memory coupled to theprocessor. The processor may be configured to perform operationsdescribed herein with respect to the wireless device. In some otherimplementations, the apparatus may include a non-transitorycomputer-readable medium having program code recorded thereon and theprogram code may be executable by a computer for causing the computer toperform operations described herein with reference to the wirelessdevice. In some implementations, the apparatus may include one or moremeans configured to perform operations described herein.

In a seventeenth aspect, the configuration of resources includes one ormore time resources associated with RMSI repetition or RMSI slotaggregation, one or more frequency resources associated with RMSIrepetition or RMSI slot aggregation, one or more keying modes associatedwith RMSI repetition or RMSI slot aggregation, or a combination thereof.

In an eighteenth aspect, alone or in combination with the seventeenthaspect, the DCI indicates that the configuration of resources isassociated with RMSI repetition, the RMSI message is included in a firstTB of the RMSI PDSCH, and each of one or more repetitions of the RMSImessage is included in a respective other TB of the RMSI PDSCH.

In a nineteenth aspect, in combination with the eighteenth aspect, theapparatus transmits the first TB during a first slot of a frame andtransmits each of the other TBs during a respective other slot of theframe.

In a twentieth aspect, alone or in combination with one or more of theseventeenth through nineteenth aspects, the DCI indicates that theconfiguration of resources is associated with RMSI slot aggregation andtransmitting the single RMSI message includes transmitting, to the oneor more UEs, a first TB including a first portion of the single RMSImessage via the RMSI PDSCH and transmitting, to the one or more UEs, oneor more other TBs each including a respective other portion of thesingle RMSI message via the RMSI PDSCH.

In a twenty-first aspect, in combination with the twentieth aspect, theapparatus transmits the first TB during a first slot of a frame andtransmits each of the other TBs during a respective other slot of theframe.

In a twenty-second aspect, alone or in combination with one or more ofthe seventeenth through twenty-first aspects, the RMSI PDCCH istransmitted within a Type0-PDCCH common search space.

In a twenty-third aspect, alone or in combination with one or more ofthe seventeenth through twenty-second aspects, the apparatus transmits,to the one or more UEs, a PBCH that includes a configuration messageassociated with a particular CORESET. One or more fields of theconfiguration message indicate a mapping between a value of one or morefields of the DCI and resources, parameters, or both resources andparameters associated with RMSI repetition or RMSI slot aggregation.

In a twenty-fourth aspect, in combination with the twenty-third aspect,the particular CORESET is CORESET0.

In a twenty-fifth aspect, alone or in combination with one or more ofthe seventeenth through twenty-fourth aspects, the apparatus transmits,to the one or more UEs, a PBCH. One or more reserved bits of the PBCHindicate the configuration of resources associated with RMSI repetitionor RMSI slot aggregation.

In a twenty-sixth aspect, alone or in combination with one or more ofthe seventeenth through twenty-fifth aspects, the apparatus transmits,to the one or more UEs, a PBCH that includes a configuration messageassociated with a particular CORESET. One or more fields of theconfiguration message are interpretable based on predeterminedconfiguration information stored at the UE.

In a twenty-seventh aspect, in combination with the twenty-sixth aspect,the predetermined configuration information includes a table, a firstcolumn of the table indicates a first interpretation of the one or morefields that is to be used by a first type of UEs, and a second column ofthe table indicates a second interpretation of the one or more fieldsthat is to be used by a second type of UEs that are configured tosupport RMSI repetition or RMSI slot aggregation.

In a twenty-eighth aspect, alone or in combination with one or more ofthe twenty-sixth through twenty-seventh aspects, the predeterminedconfiguration information indicates a mapping between a value of one ormore fields of the DCI and resources, parameters, or both resources andparameters corresponding to RMSI repetition or RMSI slot aggregation.

In a twenty-ninth aspect, alone or in combination with one or more ofthe twenty-sixth through twenty-eighth aspects, the particular CORESETis CORESET0.

In a thirtieth aspect, alone or in combination with one or more of thetwenty-sixth through twenty-ninth aspects, the predeterminedconfiguration information is specified by a 3GPP wireless communicationstandard specification.

In some aspects, an apparatus configured for wireless communication,such as a base station, is configured to transmit, to one or more UEs,an RMSI PDCCH that includes DCI indicating a configuration of resourcesassociated with RMSI repetition or RMSI slot aggregation. The apparatusis further configured to transmit, to the one or more UEs, an RMSI PDSCHover the resources using RMSI repetition or RMSI slot aggregationaccording to the configuration of resources. The transmitting includestransmitting multiple repetitions of an RMSI message based on using RMSIrepetition and transmitting a single RMSI message divided acrossmultiple slots based on using RMSI slot aggregation. In someimplementations, the apparatus includes a wireless device, such as abase station. In some implementations, the apparatus may include atleast one processor, and a memory coupled to the processor. Theprocessor may be configured to perform operations described herein withrespect to the wireless device. In some other implementations, theapparatus may include a non-transitory computer-readable medium havingprogram code recorded thereon and the program code may be executable bya computer for causing the computer to perform operations describedherein with reference to the wireless device. In some implementations,the apparatus may include one or more means configured to performoperations described herein.

In a thirty-first aspect, the configuration of resources includes one ormore time resources associated with RMSI repetition or RMSI slotaggregation, one or more frequency resources associated with RMSIrepetition or RMSI slot aggregation, one or more keying modes associatedwith RMSI repetition or RMSI slot aggregation, or a combination thereof.

In a thirty-second aspect, alone or in combination with the thirty-firstaspect, the apparatus transmits, to the one or more UEs, a PBCH thatincludes a configuration message associated with a particular CORESET.The configuration message includes one or more fields that indicate amapping between a value of one or more fields of the DCI and resources,parameters, or both resources and parameters associated with RMSIrepetition or RMSI slot aggregation.

In a thirty-third aspect, alone or in combination with the thirty-firstaspect, the apparatus transmits, to the one or more UEs, a PBCHincluding one or more reserved bits that indicate that the configurationof resources is associated with RMSI repetition or RMSI slotaggregation.

In a thirty-fourth aspect, alone or in combination with the thirty-firstaspect, the apparatus transmits to the one or more UEs, a PBCH thatincludes a configuration message associated with a particular CORESET.The configuration message includes one or more fields that areinterpretable based on predetermined configuration information stored atthe one or more UEs.

In a thirty-fifth aspect, in combination with the thirty-fourth aspect,the predetermined configuration information includes a table, a firstcolumn of the table indicates a first interpretation of the one or morefields that is to be used by a first type of UEs, and a second column ofthe table indicates a second interpretation of the one or more fieldsthat is to be used by a second type of UEs that are configured tosupport RMSI repetition or RMSI slot aggregation.

In a thirty-sixth aspect, in combination with the thirty-fourth aspect,the predetermined configuration information indicates a mapping betweena value of one or more fields of the DCI and resources, parameters, orboth resources and parameters corresponding to RMSI repetition or RMSIslot aggregation.

Those of skill in the art would understand that information and signalsmay be represented using any of a variety of different technologies andtechniques. For example, data, instructions, commands, information,signals, bits, symbols, and chips that may be referenced throughout theabove description may be represented by voltages, currents,electromagnetic waves, magnetic fields or particles, optical fields orparticles, or any combination thereof.

Components, the functional blocks, and the modules described herein withrespect to FIGS. 1-8 include processors, electronics devices, hardwaredevices, electronics components, logical circuits, memories, softwarecodes, firmware codes, among other examples, or any combination thereof.In addition, features discussed herein may be implemented viaspecialized processor circuitry, via executable instructions, orcombinations thereof.

Those of skill would further appreciate that the various illustrativelogical blocks, modules, circuits, and algorithm steps described inconnection with the disclosure herein may be implemented as electronichardware, computer software, or combinations of both. To clearlyillustrate this interchangeability of hardware and software, variousillustrative components, blocks, modules, circuits, and steps have beendescribed above generally in terms of their functionality. Whether suchfunctionality is implemented as hardware or software depends upon theparticular application and design constraints imposed on the overallsystem. Skilled artisans may implement the described functionality invarying ways for each particular application, but such implementationdecisions should not be interpreted as causing a departure from thescope of the present disclosure. Skilled artisans will also readilyrecognize that the order or combination of components, methods, orinteractions that are described herein are merely examples and that thecomponents, methods, or interactions of the various aspects of thepresent disclosure may be combined or performed in ways other than thoseillustrated and described herein.

The various illustrative logics, logical blocks, modules, circuits andalgorithm processes described in connection with the implementationsdisclosed herein may be implemented as electronic hardware, computersoftware, or combinations of both. The interchangeability of hardwareand software has been described generally, in terms of functionality,and illustrated in the various illustrative components, blocks, modules,circuits and processes described above. Whether such functionality isimplemented in hardware or software depends upon the particularapplication and design constraints imposed on the overall system.

The hardware and data processing apparatus used to implement the variousillustrative logics, logical blocks, modules and circuits described inconnection with the aspects disclosed herein may be implemented orperformed with a general purpose single- or multi-chip processor, adigital signal processor (DSP), an application specific integratedcircuit (ASIC), a field programmable gate array (FPGA) or otherprogrammable logic device, discrete gate or transistor logic, discretehardware components, or any combination thereof designed to perform thefunctions described herein. A general purpose processor may be amicroprocessor, or, any conventional processor, controller,microcontroller, or state machine. In some implementations, a processormay be implemented as a combination of computing devices, such as acombination of a DSP and a microprocessor, a plurality ofmicroprocessors, one or more microprocessors in conjunction with a DSPcore, or any other such configuration. In some implementations,particular processes and methods may be performed by circuitry that isspecific to a given function.

In one or more aspects, the functions described may be implemented inhardware, digital electronic circuitry, computer software, firmware,including the structures disclosed in this specification and theirstructural equivalents thereof, or in any combination thereof.Implementations of the subject matter described in this specificationalso can be implemented as one or more computer programs, that is one ormore modules of computer program instructions, encoded on a computerstorage media for execution by, or to control the operation of, dataprocessing apparatus.

If implemented in software, the functions may be stored on ortransmitted over as one or more instructions or code on acomputer-readable medium. The processes of a method or algorithmdisclosed herein may be implemented in a processor-executable softwaremodule which may reside on a computer-readable medium. Computer-readablemedia includes both computer storage media and communication mediaincluding any medium that can be enabled to transfer a computer programfrom one place to another. A storage media may be any available mediathat may be accessed by a computer. By way of example, and notlimitation, such computer-readable media may include RAM, ROM, EEPROM,CD-ROM or other optical disk storage, magnetic disk storage or othermagnetic storage devices, or any other medium that may be used to storedesired program code in the form of instructions or data structures andthat may be accessed by a computer. Also, any connection can be properlytermed a computer-readable medium. Disk and disc, as used herein,includes compact disc (CD), laser disc, optical disc, digital versatiledisc (DVD), floppy disk, and Blu-ray disc where disks usually reproducedata magnetically, while discs reproduce data optically with lasers.Combinations of the above should also be included within the scope ofcomputer-readable media. Additionally, the operations of a method oralgorithm may reside as one or any combination or set of codes andinstructions on a machine readable medium and computer-readable medium,which may be incorporated into a computer program product.

Various modifications to the implementations described in thisdisclosure may be readily apparent to those skilled in the art, and thegeneric principles defined herein may be applied to some otherimplementations without departing from the spirit or scope of thisdisclosure. Thus, the claims are not intended to be limited to theimplementations shown herein, but are to be accorded the widest scopeconsistent with this disclosure, the principles and the novel featuresdisclosed herein.

Additionally, a person having ordinary skill in the art will readilyappreciate, the terms “upper” and “lower” are sometimes used for ease ofdescribing the figures, and indicate relative positions corresponding tothe orientation of the figure on a properly oriented page, and may notreflect the proper orientation of any device as implemented.

Certain features that are described in this specification in the contextof separate implementations also can be implemented in combination in asingle implementation. Conversely, various features that are describedin the context of a single implementation also can be implemented inmultiple implementations separately or in any suitable subcombination.Moreover, although features may be described above as acting in certaincombinations and even initially claimed as such, one or more featuresfrom a claimed combination can in some cases be excised from thecombination, and the claimed combination may be directed to asubcombination or variation of a subcombination.

Similarly, while operations are depicted in the drawings in a particularorder, this should not be understood as requiring that such operationsbe performed in the particular order shown or in sequential order, orthat all illustrated operations be performed, to achieve desirableresults. Further, the drawings may schematically depict one more exampleprocesses in the form of a flow diagram. However, other operations thatare not depicted can be incorporated in the example processes that areschematically illustrated. For example, one or more additionaloperations can be performed before, after, simultaneously, or betweenany of the illustrated operations. In certain circumstances,multitasking and parallel processing may be advantageous. Moreover, theseparation of various system components in the implementations describedabove should not be understood as requiring such separation in allimplementations, and it should be understood that the described programcomponents and systems can generally be integrated together in a singlesoftware product or packaged into multiple software products.Additionally, some other implementations are within the scope of thefollowing claims. In some cases, the actions recited in the claims canbe performed in a different order and still achieve desirable results.

As used herein, including in the claims, the term “or,” when used in alist of two or more items, means that any one of the listed items can beemployed by itself, or any combination of two or more of the listeditems can be employed. For example, if a composition is described ascontaining components A, B, or C, the composition can contain A alone; Balone; C alone; A and B in combination; A and C in combination; B and Cin combination; or A, B, and C in combination. Also, as used herein,including in the claims, “or” as used in a list of items prefaced by “atleast one of” indicates a disjunctive list such that, for example, alist of “at least one of A, B, or C” means A or B or C or AB or AC or BCor ABC (that is A and B and C) or any of these in any combinationthereof. The term “substantially” is defined as largely but notnecessarily wholly what is specified (and includes what is specified;for example, substantially 90 degrees includes 90 degrees andsubstantially parallel includes parallel), as understood by a person ofordinary skill in the art. In any disclosed implementations, the term“substantially” may be substituted with “within [a percentage] of” whatis specified, where the percentage includes 0.1, 1, 5, or 10 percent.

The previous description of the disclosure is provided to enable anyperson skilled in the art to make or use the disclosure. Variousmodifications to the disclosure will be readily apparent to thoseskilled in the art, and the generic principles defined herein may beapplied to other variations without departing from the spirit or scopeof the disclosure. Thus, the disclosure is not intended to be limited tothe examples and designs described herein but is to be accorded thewidest scope consistent with the principles and novel features disclosedherein.

What is claimed is:
 1. A method of wireless communication performed by auser equipment (UE), the method comprising: receiving, from a basestation, a remaining minimum system information (RMSI) physical downlinkcontrol channel (PDCCH) that includes downlink control information(DCI), the DCI indicating a configuration of resources associated withRMSI repetition or RMSI slot aggregation; and monitoring for one or moreRMSI messages based on the configuration of resources, the monitoringcomprising monitoring for multiple repetitions of an RMSI message basedon the configuration of resources being associated with RMSI repetitionand monitoring for a single RMSI message that is divided across multipleslots based on the configuration of resources being associated with RMSIslot aggregation.
 2. The method of claim 1, wherein the configuration ofresources includes one or more time resources associated with RMSIrepetition or RMSI slot aggregation, one or more frequency resourcesassociated with RMSI repetition or RMSI slot aggregation, one or morekeying modes associated with RMSI repetition or RMSI slot aggregation,or a combination thereof.
 3. The method of claim 1, wherein theconfiguration of resources is associated with RMSI repetition and themethod further comprises: receiving, from the base station, an RMSIphysical downlink shared channel (PDSCH) that includes multipletransport blocks (TBs) including the multiple repetitions of the RMSImessage, each repetition of the RMSI message being included in arespective TB of the multiple TBs.
 4. The method of claim 3, whereinreceiving the RMSI PDSCH comprises: receiving each TB of the multipleTBs during a respective slot of a same frame.
 5. The method of claim 1,wherein the configuration of resources is associated with RMSI slotaggregation and the method further comprises: receiving, from the basestation, multiple transport blocks (TBs) via an RMSI physical downlinkshared channel (PDSCH), each TB of the multiple TBs including arespective portion of the single RMSI message.
 6. The method of claim 5,wherein each TB of the multiple TBs is received during a respective slotof a same frame.
 7. The method of claim 5, further comprising:aggregating the portions of the single RMSI message that are included inthe multiple TBs to construct the single RMSI message.
 8. The method ofclaim 1, further comprising monitoring a Type0-PDCCH common searchspace, wherein receiving the RMSI PDCCH is based on the monitoring.
 9. Auser equipment (UE) comprising: at least one processor; and a memorycoupled with the at least one processor and storing processor-readablecode that, when executed by the at least one processor, is configuredto: receive, from a base station, a remaining minimum system information(RMSI) physical downlink control channel (PDCCH) that includes downlinkcontrol information (DCI), the DCI indicating a configuration ofresources associated with RMSI repetition or RMSI slot aggregation; andmonitor for one or more RMSI messages based on the configuration ofresources, the monitoring comprising monitoring for multiple repetitionsof an RMSI message based on the configuration of resources beingassociated with RMSI repetition and monitoring for a single RMSI messagethat is divided across multiple slots based on the configuration ofresources being associated with RMSI slot aggregation.
 10. The UE ofclaim 9, wherein the configuration of resources includes one or moretime resources associated with RMSI repetition or RMSI slot aggregation,one or more frequency resources associated with RMSI repetition or RMSIslot aggregation, one or more keying modes associated with RMSIrepetition or RMSI slot aggregation, or a combination thereof.
 11. TheUE of claim 9, wherein the configuration of resources is associated withRMSI repetition and the at least one processor is further configured to:receive, from the base station, an RMSI physical downlink shared channel(PDSCH) that includes multiple transport blocks (TBs) including themultiple repetitions of the RMSI message, each repetition of the RMSImessage being included in a respective TB of the multiple TBs.
 12. TheUE of claim 11, wherein the at least one processor is configured, toreceive the RMSI PDSCH, to receive each TB of the multiple TBs during arespective slot of a same frame.
 13. The UE of claim 9, wherein theconfiguration of resources is associated with RMSI slot aggregation andthe at least one processor is further configured to: receive, from thebase station, multiple transport blocks (TBs) via an RMSI physicaldownlink shared channel (PDSCH), each TB of the multiple TBs including arespective portion of the single RMSI message.
 14. The UE of claim 13,wherein each TB of multiple TBs is received during a respective slot ofa same frame.
 15. The UE of claim 13, wherein the at least one processoris further configured to: aggregate the portions of the single RMSImessage that are included in the multiple TBs to construct the singleRMSI message.
 16. The UE of claim 9, wherein the at least one processoris further configured to monitor a Type0-PDCCH common search space,wherein receiving the RMSI PDCCH is based on the monitoring.
 17. Amethod of wireless communication performed by a base station, the methodcomprising: transmitting, to one or more user equipments (UEs), aremaining minimum system information (RMSI) physical downlink controlchannel (PDCCH) that includes downlink control information (DCI)indicating a configuration of resources associated with RMSI repetitionor RMSI slot aggregation; and transmitting, to the one or more UEs, anRMSI physical downlink shared channel (PDSCH) over the resources usingRMSI repetition or RMSI slot aggregation according to the configurationof resources, the transmitting including transmitting multiplerepetitions of an RMSI message based on using RMSI repetition andtransmitting a single RMSI message that is divided across multiple slotsbased on using RMSI slot aggregation.
 18. The method of claim 17,wherein the configuration of resources includes one or more timeresources associated with RMSI repetition or RMSI slot aggregation, oneor more frequency resources associated with RMSI repetition or RMSI slotaggregation, one or more keying modes associated with RMSI repetition orRMSI slot aggregation, or a combination thereof.
 19. The method of claim17, further comprising: transmitting, to the one or more UEs, a physicalbroadcast channel (PBCH) that includes a configuration messageassociated with a particular control resource set (CORESET), theconfiguration message including one or more fields that indicate amapping between a value of one or more fields of the DCI and resources,parameters, or both resources and parameters associated with RMSIrepetition or RMSI slot aggregation.
 20. The method of claim 17, furthercomprising: transmitting, to the one or more UEs, a physical broadcastchannel (PBCH) including one or more reserved bits that indicate thatthe configuration of resources is associated with RMSI repetition orRMSI slot aggregation.
 21. The method of claim 17, further comprising:transmitting, to the one or more UEs, a physical broadcast channel(PBCH) that includes a configuration message associated with aparticular control resource set (CORESET), the configuration messageincluding one or more fields that are interpretable based onpredetermined configuration information stored at the one or more UEs.22. The method of claim 21, wherein: the predetermined configurationinformation includes a table; a first column of the table indicates afirst interpretation of the one or more fields that is to be used by afirst type of UEs; and a second column of the table indicates a secondinterpretation of the one or more fields that is to be used by a secondtype of UEs that are configured to support RMSI repetition or RMSI slotaggregation.
 23. The method of claim 21, wherein the predeterminedconfiguration information indicates a mapping between a value of one ormore fields of the DCI and resources, parameters, or both resources andparameters corresponding to RMSI repetition or RMSI slot aggregation.24. A base station comprising: at least one processor; and a memorycoupled with the at least one processor and storing processor-readablecode that, when executed by the at least one processor, is configuredto: initiate transmission, to one or more user equipments (UEs), of aremaining minimum system information (RMSI) physical downlink controlchannel (PDCCH) that includes downlink control information (DCI)indicating a configuration of resources associated with RMSI repetitionor RMSI slot aggregation; and initiate transmission, to the one or moreUEs, of an RMSI physical downlink shared channel (PDSCH) over theresources using RMSI repetition or RMSI slot aggregation according tothe configuration of resources, the transmission including transmissionof multiple repetitions of an RMSI message based on using RMSIrepetition and transmission of a single RMSI message that is dividedacross multiple slots based on using RMSI slot aggregation.
 25. The basestation of claim 24, wherein the configuration of resources includes oneor more time resources associated with RMSI repetition or RMSI slotaggregation, one or more frequency resources associated with RMSIrepetition or RMSI slot aggregation, one or more keying modes associatedwith RMSI repetition or RMSI slot aggregation, or a combination thereof.26. The base station of claim 24, wherein the at least one processor isfurther configured to: initiate transmission, to the one or more UEs, ofa physical broadcast channel (PBCH) that includes a configurationmessage associated with a particular control resource set (CORESET), theconfiguration message including one or more fields that indicate amapping between a value of one or more fields of the DCI and resources,parameters, or both resources and parameters associated with RMSIrepetition or RMSI slot aggregation.
 27. The base station of claim 24,wherein the at least one processor is further configured to: initiatetransmission, to the one or more UEs, of a physical broadcast channel(PBCH) including one or more reserved bits that indicate that theconfiguration of resources is associated with RMSI repetition or RMSIslot aggregation.
 28. The base station of claim 24, wherein the at leastone processor is further configured to: initiate transmission, to theone or more UEs, of a physical broadcast channel (PBCH) that includes aconfiguration message associated with a particular control resource set(CORESET), the configuration message including one or more fields thatare interpretable based on predetermined configuration informationstored at the one or more UEs.
 29. The base station of claim 28,wherein: the predetermined configuration information includes a table; afirst column of the table indicates a first interpretation of the one ormore fields that is to be used by a first type of UEs; and a secondcolumn of the table indicates a second interpretation of the one or morefields that is to be used by a second type of UEs that are configured tosupport RMSI repetition or RMSI slot aggregation.
 30. The base stationof claim 28, wherein the predetermined configuration informationindicates a mapping between a value of one or more fields of the DCI andresources, parameters, or both resources and parameters corresponding toRMSI repetition or RMSI slot aggregation.